Vulcanizing machine hot plate and vulcanizing machine

Abstract

The utility model belongs to the field of rubber and plastic vulcanization, and particularly relates to a vulcanizing machine hot plate and a vulcanizing machine, which comprise an upper cover plate (1), a framework (2) and a lower cover plate (3), the upper cover plate (1), the framework (2) and the lower cover plate (3) are fixedly connected in sequence through angle welding; a steam pipeline is arranged in the framework (2), and a steam inlet / outlet (4) communicated with the head end and the tail end of the steam pipeline respectively is formed in the side edge of the framework (2). Compared with the prior art, the problems that in the machining process of the vulcanizing machine hot plate in the prior art, the groove welding technology cost is high, and the material utilization rate is low; the number of hot plate parts for seam filling welding and plug welding is large, the welding amount is large, and the cost is high. The hot plate of the vulcanizing machine is low in cost, reasonable in structure, small in number of parts, simple in production process and capable of effectively improving product quality.

Description

Technical Field

[0001] This utility model belongs to the field of rubber and plastic vulcanization, specifically relating to a vulcanizing machine hot plate and a vulcanizing machine. Background Technology

[0002] A vulcanizing machine is a key piece of equipment for the vulcanization and molding of rubber and plastic products, with functions such as temperature control, pressure holding vulcanization, mold opening, and shipment. The hot plate of the vulcanizing machine is the heat source control unit that enables the constant temperature function of the vulcanizing machine, and it is usually designed as a disc-shaped component with inlet and outlet pipes in the inner cavity.

[0003] Common vulcanizing machine hot plates mainly adopt two forms. One is a labyrinth design, which requires a lot of milling to create cavities. After covering the other side with a cover plate, it is welded with a certain bevel to finally form a steam channel. This process is costly and has a very low material utilization rate. The other is to use upper and lower cover plates with welded vertical plates (stiffeners) in the middle. This requires pre-cutting a lot of bevels on the parts and completing the assembly through a lot of filling welding, plug welding and other processes. This type of hot plate has a large number of parts, a large amount of welding, and a relatively high cost.

[0004] For example, CN110640947A discloses a hot plate for a vulcanizing machine, including an upper panel and a lower panel. The lower panel is equally divided into multiple fan-shaped areas, and each fan-shaped area has grooves that are directly machined and distributed radially in a serpentine pattern from the inside out or from the outside in. The upper and lower panels are butt-welded to form serpentine steam channels distributed in the multiple fan-shaped areas. Plug welding of the upper panel's holes improves the bonding strength between the upper and lower panels. Butt welding of the inner and outer circumferences improves the sealing performance of the mating surfaces of the upper and lower panels. The U-shaped plug welding structure effectively prevents leakage near the mold mounting holes. The hot plate is locked to the base by bolts and the central threaded hole of the positioning support column, while the positioning support column provides strong support for the upper and lower panels. This structure employs various welding methods, including plug welding and butt welding, resulting in a complex overall structure, numerous steps, and a large number of supporting equipment required during production, leading to high costs.

[0005] Furthermore, CN107962720A discloses a ring-milled hot plate for a vulcanizing machine, which uses plug welding to assemble the hot plate; CN105729686A discloses a large-diameter vulcanizing machine hot plate and its preparation method, which uses bevel welding to assemble the hot plate; etc. It is evident that the assembly process of the vulcanizing machine hot plates disclosed in the prior art is complex and costly.

[0006] Therefore, a vulcanizing machine hot plate with low cost, simple structure and process can significantly reduce the cost of vulcanizing machines, thereby greatly improving product competitiveness. Utility Model Content

[0007] The purpose of this utility model is to provide a vulcanizing machine hot plate to solve at least one of the above-mentioned problems, thereby addressing the issues in the existing vulcanizing machine hot plate processing technology: high cost and low material utilization of bevel welding; and high cost due to the large number of hot plate parts and welding volume of filler welding and plug welding. This solution proposes a low-cost vulcanizing machine hot plate with a reasonable structure, fewer parts, and a simple manufacturing process, while also effectively improving product quality.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] The first aspect of this utility model discloses a hot plate for a vulcanizing machine, including an upper cover plate, a frame, and a lower cover plate;

[0010] The upper cover plate, the frame, and the lower cover plate are sequentially fixedly connected by fillet welds;

[0011] The frame is equipped with a steam pipe, and the sides of the frame are provided with steam inlet and outlet that are respectively connected to the beginning and end of the steam pipe.

[0012] Preferably, the fillet welds are evenly distributed to reduce welding deformation and improve welding quality.

[0013] Preferably, the hot plate of the vulcanizing machine has a central hole.

[0014] Preferably, the fillet weld has a rounded corner structure to facilitate automated robotic welding and ensure the welding quality.

[0015] Preferably, the flatness of the hot plate of the vulcanizing machine is no more than 2 mm.

[0016] Preferably, the flatness between the frame and the lower cover plate is no more than 2 mm.

[0017] Preferably, the hot plate of the vulcanizing machine has mounting holes.

[0018] Preferably, the hot plate of the vulcanizing machine is provided with a T-shaped groove.

[0019] Preferably, the hot plate of the vulcanizing machine is provided with mounting holes and T-slots.

[0020] The mounting holes and T-slots are designed to facilitate the assembly of the hot plate of the vulcanizing machine onto the main body of the vulcanizing machine. A number of mounting holes and T-slots can be provided at intervals as needed; for example, T-slots can be evenly spaced circumferentially, and mounting holes can be arranged radially at intervals to form a row of mounting holes, which can then be evenly spaced circumferentially.

[0021] Preferably, the skeleton and the top cover plate are both petal-shaped structures.

[0022] The second aspect of this utility model discloses a vulcanizing machine, including a vulcanizing machine body and a vulcanizing machine hot plate as described above, wherein the vulcanizing machine hot plate is assembled on the vulcanizing machine body.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The matching of the upper cover plate, frame and lower cover plate can form a simple fillet weld, which is convenient for welding and avoids costly steps such as overlay welding, plug welding or labyrinth machining, which significantly reduces welding time and welding volume; in addition, the hot plate of the vulcanizing machine can be locked to the base by bolts and mounting holes, which makes assembly simple.

[0025] The hot plate structure of the vulcanizing machine in this solution is reasonable, and the welding process is simple. After all the fillet welds are welded, the stress is more uniform, which effectively increases the connection strength between the upper and lower cover plates. Moreover, bulging is not easy to occur when the cover plate is closed, and the hot plate has a long service life. It can effectively improve product quality while reducing product costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the axial structure of the hot plate of the vulcanizing machine;

[0027] Figure 2 This is a rear view schematic diagram of the hot plate structure of the vulcanizing machine;

[0028] Figure 3 This is a side view of the hot plate structure of the vulcanizing machine;

[0029] Figure 4 This is a schematic diagram of the upper cover plate in the hot plate of the vulcanizing machine;

[0030] Figure 5 This is a schematic diagram of the structure of the lower cover plate in the hot plate of the vulcanizing machine;

[0031] Figure 6 This is a schematic diagram of the skeleton structure in the hot plate of a vulcanizing machine;

[0032] In the diagram: 1-Upper cover plate; 2-Frame; 3-Lower cover plate; 4-Steam inlet and outlet. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] The existing vulcanizing machine hot plate consists of two circular plates, upper and lower, and a frame 2 sandwiched in the middle. The frame 2 is composed of several ribs forming steam channels. This structure has numerous parts and is complex. In addition, during the welding process, although the ribs can be easily welded to the lower plate, when welding the upper plate, the welding points are numerous and located on the inside, which are blocked by various structures. Therefore, the welding is difficult, of poor quality, and inefficient. If one or more points are not welded firmly, steam can easily pass through the leakage point and not be transported along the planned path, resulting in uneven heat exchange and reduced heat exchange efficiency of the hot plate.

[0035] Example 1

[0036] A hot plate for a vulcanizing machine, such as Figure 1-6 As shown, it includes an upper cover plate 1, a frame 2, and a lower cover plate 3;

[0037] The upper cover plate 1, the frame 2, and the lower cover plate 3 are sequentially fixedly connected by fillet welds;

[0038] The frame 2 is equipped with a steam pipe inside, and the side of the frame 2 is provided with a steam inlet and outlet 4 that are respectively connected to the beginning and end of the steam pipe.

[0039] More specifically, in this embodiment:

[0040] like Figure 1-6 As shown, a low-cost vulcanizing machine hot plate consists of three parts: a lower cover plate 3, a frame 2, and an upper cover plate 1. The lower cover plate 3 is a circular part obtained by direct blanking; the frame 2 is a petal-shaped structure part corresponding to the steam pipe, also obtained by direct blanking; and the upper cover plate 1 is also formed by direct blanking and corresponds to the shape of the frame 2. Steam inlet and outlet 4 are provided on the side of the frame 2, corresponding to the beginning and end of the steam pipe.

[0041] like Figure 5 The diagram shown is a top view of the structure of the lower cover plate 3, which is a ring-shaped structure with a central opening for positioning and installation in conjunction with the structure of the vulcanizing machine. A series of radially arranged mounting holes are opened on the ring of the lower cover plate 3 at 90° intervals.

[0042] like Figure 6The diagram shows a top view of the skeleton 2, which is also a circular structure with a petal-shaped design (the outer ring is the enclosing edge of the petal-shaped structure). The sides of the skeleton 2 are equipped with steam inlet / outlet 4 for steam entry and exit, and steam pipes are arranged along the petal-shaped structure inside to provide a larger heat exchange area. Corresponding to the lower cover plate 3, it also has radially arranged strings of mounting holes spaced at 90° intervals, located within the welded guide grooves formed by the petal structure. Specifically, the petal-shaped structure is an axially symmetrical figure with a total of 8 petals (a fan-ring structure). Welded guide grooves are formed between the petals (the mounting holes are all located within the welded guide grooves formed between the petals), and each petal also has a welded guide groove extending outward from the center. In particular, at the locations where the steam inlet / outlet 4 is located, such as... Figure 6 In the middle, the two petals on the far right are further separated and compressed into two halves, with a steam inlet / outlet 4 set on each half.

[0043] like Figure 4 The diagram shows a top view of the upper cover plate 1, which adopts a petal-shaped structure, basically consistent with the petal-shaped structure of the frame 2. Since the upper cover plate 1 does not involve the steam inlet / outlet 4 or the steam pipeline, at the steam inlet / outlet 4, the upper cover plate 1 is designed as two complete petals. However, the welding guide grooves extending from the inside to the outside on it need to be set at corresponding positions on the frame 2. The upper cover plate 1 and the frame 2 are joined by fillet welds through multiple exposed welding guide grooves, which effectively ensures the welding strength and quality, reduces the welding difficulty, improves welding efficiency, and ultimately improves the quality and heat exchange efficiency of the vulcanizing machine's hot plate.

[0044] All welds between the aforementioned parts are fillet welds formed after cutting and blanking. Furthermore, all welds feature rounded corners for easy automated robotic welding, ensuring weld quality.

[0045] The hot plate of the vulcanizing machine is also provided with mounting holes (through holes) and / or T-slots to facilitate the installation of the hot plate of the vulcanizing machine onto the base of the vulcanizing machine.

[0046] The vulcanizing machine also has a through-hole in the center of the hot plate.

[0047] The hot plate of the vulcanizing machine is prepared by the following specific method:

[0048] S1. The lower cover plate 3 is directly blanked and machined into a disc-shaped part with a central hole;

[0049] S2. Align the center holes of the lower cover plate 3 and the frame 2 to ensure that the relative center positions of the lower cover plate 3 and the frame 2 are accurate, and drill holes at the predetermined steam inlet and outlet 4;

[0050] S3. After pressing the lower cover plate 3 and the frame 2 with a press, spot welding is performed to ensure good matching between the parts;

[0051] S4. Weld all fillet welds between the lower cover plate 3 and the frame 2 to ensure good welding of the base plate and the frame 2, and to ensure sealing and strength;

[0052] S5. Level the assembly consisting of the welded lower cover plate 3 and frame 2, and check that its flatness is no more than 2mm.

[0053] S6. After the lower cover plate 3 and the frame 2 are leveled, the upper cover plate 1 is placed on top. The relative position of the upper cover plate 1 is located by the edge position of the petal-shaped structure of the frame 2 (alignment is achieved by the external positioning fixture through three-point positioning), so that the steam channel formed by the upper cover plate 1, the frame 2, and the lower cover plate 3 has good sealing and weldability.

[0054] S7. Level the welded upper cover plate 1 and lower cover plate 3, and check that their flatness is no more than 2mm.

[0055] S8. Use a vertical lathe to rough-turn / semi-finish-turn the hot plate of the vulcanizing machine until it is smooth and leave a total thickness allowance of 5mm.

[0056] S9. Drill holes in the hot plate of the vulcanizing machine using a drilling machine;

[0057] S10. Use a CNC machine tool to bore and mill mounting holes and / or T-slots on the hot plate of the vulcanizing machine;

[0058] S11. Use a vertical lathe to precision machine the top and bottom surfaces of the vulcanizing machine hot plate until the thickness meets the standard requirements (determined according to product requirements);

[0059] S12. Grind the top and bottom surfaces of the hot plate of the vulcanizing machine using a grinding machine;

[0060] S13. Perform various inspections and cleanings on the hot plate of the vulcanizing machine, specifically:

[0061] S13.1. Pass steam through the hot plate of the vulcanizing machine for testing, maintain the pressure for 15 minutes, and the pressure drop must be less than the specified value;

[0062] S13.2. Perform temperature measurement on the working surface of the vulcanizing machine hot plate. The temperature measurement points are divided into 4 sectors, with 12 points in each sector, for a total of 48 points. After preheating for 60 minutes, start the test. The temperature difference between any two temperature measurement points must be less than 2℃. After the temperature measurement is completed, blow dry the water accumulated in the steam pipe of the vulcanizing machine hot plate and plug the joint with a plug.

[0063] To further optimize the implementation effect of the present invention, based on the above content, step S3 specifically includes the following sub-steps:

[0064] S3.1. After pressing the lower cover plate 3 and the frame 2 with a press, spot weld them together. When pressing the two parts, the gap between the parts must be less than the standard value (set according to the customer's product requirements) before spot welding to fix them together.

[0065] S3.2. After pressing the lower cover plate 3 and the frame 2 with a press, spot welding is performed. The number of spot welds should be evenly distributed to reduce welding deformation and improve welding quality.

[0066] To further optimize the implementation effect of the present invention, based on the above content, step S4 specifically includes the following sub-steps:

[0067] S4.1. When welding all fillet welds between the lower cover plate 3 and the frame 2, segmented welding shall be used to reduce welding deformation;

[0068] S4.2. When welding all fillet welds between the lower cover plate 3 and the frame 2, a symmetrical welding route shall be adopted to reduce welding deformation.

[0069] In summary, the vulcanizing machine hot plate of this design is assembled from three parts by fillet welds, making it suitable for welding hot plates of various diameters. It also avoids processes such as beveling, plug welding, and filler welding, resulting in a simple structure and stable, reliable hot plate quality.

[0070] Example 2

[0071] This embodiment provides a vulcanizing machine that uses the vulcanizing machine hot plate as given in Embodiment 1. The vulcanizing machine hot plate is bolted to the base of the vulcanizing machine body.

[0072] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A hot plate for a vulcanizing machine, characterized in that, It includes an upper cover plate (1), a frame (2), and a lower cover plate (3); The upper cover plate (1), the frame (2) and the lower cover plate (3) are sequentially fixedly connected by fillet welds; The frame (2) is equipped with a steam pipe inside, and the side of the frame (2) is provided with steam inlet and outlet (4) that are respectively connected to the beginning and end of the steam pipe.

2. A vulcanizing machine hot plate according to claim 1, characterized in that, The hot plate of the vulcanizing machine has a central hole.

3. A vulcanizing machine hot plate according to claim 1, characterized in that, The fillet weld is designed with a rounded corner structure.

4. A vulcanizing machine hot plate according to claim 1, characterized in that, The flatness of the hot plate of the vulcanizing machine is no more than 2mm.

5. A vulcanizing machine hot plate according to claim 1, characterized in that, The flatness between the frame (2) and the lower cover plate (3) is no greater than 2mm.

6. A vulcanizing machine hot plate according to claim 1, characterized in that, The hot plate of the vulcanizing machine has mounting holes.

7. A vulcanizing machine hot plate according to claim 1, characterized in that, The hot plate of the vulcanizing machine is provided with a T-shaped groove.

8. A vulcanizing machine hot plate according to claim 1, characterized in that, The hot plate of the vulcanizing machine is provided with mounting holes and T-slots.

9. A vulcanizing machine hot plate according to claim 1, characterized in that, The skeleton (2) and the upper cover plate (1) are respectively petal-shaped structures.

10. A vulcanizing machine, characterized in that, It includes a vulcanizing machine body and a vulcanizing machine hot plate as described in any one of claims 1-9, wherein the vulcanizing machine hot plate is mounted on the vulcanizing machine body.

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