A package cast resistance wire die structure of a water heater

Abstract

This invention discloses a die-casting mold structure for a water heater with a cast resistance wire, characterized by: a moving mold, a left slider, and a right slider. The moving mold has a base plate cavity corresponding to the base plate of the cast resistance wire, and the left and right sliders have second cavities corresponding to the wrapping part of the cast resistance wire. The moving mold is equipped with multiple conventional ejector pins and two clamping ejector pins. The upper end of the clamping ejector pin has a resistance wire lead insertion hole, and the upper end of the clamping ejector pin is an expansion sleeve structure with a tapered section. The moving mold is equipped with an ejector pin sleeve, and the clamping ejector pin is slidably disposed within the ejector pin sleeve. The upper part of the ejector pin sleeve has a tapered hole section that mates with the tapered section, thereby causing the expansion sleeve structure of the clamping ejector pin to contract. The beneficial effects include: a simple mold structure, good fixation of the resistance wire insert, and clamping and releasing of the resistance wire end with the extension and retraction of the ejector pins, which not only prevents the resistance wire insert from loosening during die casting but also facilitates demolding of the casting when the mold is opened.

Description

Technical Field

[0001] This invention relates to the field of molds, and more specifically to a die-casting mold structure for a water heater with a cast resistance wire. Background Technology

[0002] A novel water heater requires the use of encased resistance wire as the heating unit. Encased resistance wire involves encasing and die-casting a resistance wire into an aluminum alloy, thereby increasing the heat exchange area, improving the uniformity of the heat flow field, and preventing localized surface dry burning. Before die-casting, the resistance wire insert needs to be placed and fixed in the die-casting mold. Conventional die-casting molds have two insertion holes for the ends of the resistance wire, into which the insert is inserted and fixed. However, this fixing method is prone to detachment during the filling of molten aluminum alloy, leading to the scrapping of the die-cast product. Furthermore, the resistance wire has a stainless steel outer tube, and the tube opening must not be invaded by molten aluminum alloy during die-casting. Therefore, it is necessary to redesign the die-casting mold structure to better fix the resistance wire insert and ensure die-casting quality. Summary of the Invention

[0003] To address the shortcomings of the prior art, this invention provides a die-casting mold structure for a water heater with a cast resistance wire, which has a simple structure and good fixing effect on the resistance wire.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A die-casting mold structure for a water heater with a cast resistance wire is characterized by: a moving mold, a left slider, and a right slider, wherein the moving mold has a base plate cavity corresponding to the base plate of the cast resistance wire, and the left and right sliders have second cavities corresponding to the wrapping part of the cast resistance wire. The moving mold is provided with multiple conventional ejector pins and two clamp-type ejector pins, wherein the upper end of the clamp-type ejector pin has a resistance wire lead insertion hole, the upper end of the clamp-type ejector pin is an expansion sleeve structure, the upper part of the clamp-type ejector pin has a tapered section, and the moving mold is provided with an ejector pin sleeve. The clamp-type ejector pin is slidably disposed within the ejector pin sleeve, and the upper part of the ejector pin sleeve has a tapered hole section that mates with the tapered section, thereby causing the clamp-type ejector pin expansion sleeve structure to contract.

[0006] Furthermore, both the left and right sliders are slidably mounted on the moving mold via guide rails, and the moving mold is equipped with hydraulic cylinders that drive the left and right sliders.

[0007] Furthermore, the front end faces of the left and right sliders are staggered, and the second cavity has a central core and a fin forming part.

[0008] Furthermore, the moving mold is provided with an ejector plate, the rear end of the conventional ejector rod abuts against the end face of the ejector plate, the ejector plate is provided with an ejector fixing plate for fixing the conventional ejector rod, the ejector fixing plate is provided with an ejector rod seat, and the rear end of the clamp-type ejector rod is detachably connected to the ejector rod seat.

[0009] Furthermore, the moving mold has an embedding hole, and the ejector sleeve is inserted into the embedding hole from the rear end of the moving mold. A pressure plate is provided at the lower end of the embedding hole to limit the lower end of the ejector sleeve.

[0010] The beneficial effects of the present invention include: the mold structure is simple, the fixing effect of the resistance wire insert is good, and the end of the resistance wire can be clamped and released with the extension and retraction of the ejector rod, which not only avoids the resistance wire insert from loosening during the die casting process, but also facilitates the demolding of the casting when the mold is opened. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the clamp-type top rod structure of the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0015] One such Figure 1-3 The diagram shows the die-casting mold structure for a water heater with a resistance wire, comprising a moving mold 1, a left slider 2, and a right slider 3. The moving mold 1 has a base plate cavity corresponding to the base plate of the resistance wire. The left slider 2 and right slider 3 have second cavities corresponding to the wrapping portion of the resistance wire. The front ends of the left slider 2 and right slider 3 have an interlaced structure. The second cavity contains a central core and a fin forming portion. Multiple conventional ejector pins 4 are provided on the moving mold 1 for ejecting the casting. Additionally, two clamp-type ejector pins 5 are provided, with resistance wire lead insertion holes 20 at their upper ends for easy insertion and fixation of the resistance wire inserts at both ends. In this embodiment, the upper end of the clamp-type ejector pin 5 has an expansion sleeve structure, specifically, the upper end is evenly cut into 4-6 segments, with a gap of 0.2-0.3 mm between each segment. The upper outer periphery of the clamp-type ejector pin 5 has a tapered section 6, and the moving mold 1 is provided with an ejector pin sleeve 7. The clamp-type ejector pin 5 is slidably disposed in the ejector pin sleeve 7. The upper part of the ejector pin sleeve 7 has a tapered hole section 8 that mates with the tapered section 6. Thus, when the clamp-type ejector pin 5 moves down, the tapered hole section 8 squeezes the tapered section 6, causing the expansion sleeve structure of the clamp-type ejector pin 5 to shrink.

[0016] like Figure 1As shown, the left slider 2 and the right slider 3 are both slidably mounted on the moving mold 1 via guide rails. The moving mold 1 is equipped with a hydraulic cylinder 10 that drives the left slider 2 and the right slider 3. The left slider 2 and the right slider 3 adopt a left and right mold opening method. The casting can only be ejected after the left slider 2 and the right slider 3 open the mold.

[0017] like Figure 2 As shown, the moving mold 1 is provided with an ejector plate 9, and the rear end of the conventional ejector rod 4 abuts against the end face of the ejector plate 9. The ejector plate 9 is provided with an ejector fixing plate 11 for fixing the conventional ejector rod 4. To facilitate the installation of the clamp-type ejector rod 5, an ejector rod seat 12 is provided on the ejector fixing plate 11, and the rear end of the clamp-type ejector rod 5 is detachably connected to the ejector rod seat 12.

[0018] For ease of installation, the moving mold 1 in this embodiment has an embedding hole. The ejector sleeve 7 is inserted into the embedding hole from the rear end of the moving mold 1. A pressure plate 13 is provided at the lower end of the embedding hole to limit the lower end of the ejector sleeve 7. The ejector sleeve 7 is limited in the embedding hole by a stepped shaft. The pressure plate 13 is threaded to the lower end of the embedding hole.

[0019] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A die-casting mold structure for a water heater with a die-cast resistance wire, characterized in that: The moving mold (1), left slider (2), and right slider (3) are provided. The moving mold (1) has a base plate cavity corresponding to the base plate of the cast resistance wire. The left slider (2) and right slider (3) have a second cavity corresponding to the wrapping part of the cast resistance wire. The moving mold (1) is provided with multiple conventional ejector pins (4) and two clamping ejector pins (5). The upper end of the clamping ejector pin has a resistance wire pin insertion hole (20). The upper end of the clamping ejector pin (5) is an expansion sleeve structure. The upper part of the clamping ejector pin (5) has a tapered section (6). The moving mold (1) is provided with an ejector pin sleeve (7). The clamping ejector pin (5) is slidably disposed in the ejector pin sleeve (7). The upper part of the ejector pin sleeve (7) has a tapered hole section (8) that cooperates with the tapered section (6), thereby causing the expansion sleeve structure of the clamping ejector pin (5) to shrink.

2. The die-casting mold structure for a water heater with a cast resistance wire according to claim 1, characterized in that: The left slider (2) and the right slider (3) are both slidably mounted on the moving mold (1) via guide rails. The moving mold (1) is provided with a hydraulic cylinder (10) for driving the left slider (2) and the right slider (3).

3. The die-casting mold structure for a water heater with a cast resistance wire according to claim 2, characterized in that: The front ends of the left slider (2) and the right slider (3) are staggered, and the second cavity has a central core and a fin forming part.

4. The die-casting mold structure for a water heater with a cast resistance wire according to claim 1, characterized in that: The moving mold (1) is provided with an ejector plate (9), the rear end of the conventional ejector rod (4) abuts against the end face of the ejector plate (9), the ejector plate (9) is provided with an ejector fixing plate (11) for fixing the conventional ejector rod (4), the ejector fixing plate (11) is provided with an ejector rod seat (12), and the rear end of the clamp-type ejector rod (5) is detachably connected to the ejector rod seat (12).

5. The die-casting mold structure for a water heater with a cast resistance wire according to claim 1, characterized in that: The moving mold (1) has an embedding hole, and the ejector sleeve (7) is inserted into the embedding hole from the rear end of the moving mold (1). A pressure plate (13) is provided at the lower end of the embedding hole to limit the lower end of the ejector sleeve (7).

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