A gas valve seat mold

Abstract

This utility model discloses a gas valve seat mold, including a base plate, a lower mold, an upper mold, and four screws for connecting the base plate and the lower mold. The base plate has a through hole at the connection point, and a protrusion extending towards the axis is located in the middle of the inner wall of the through hole. The bottom of the screw protrusion is attached to the top of the protrusion, and its screw post faces upwards and connects to the lower mold. A locking block is engaged with the protrusion, and the locking block has a slot in its middle that opens to one side, forming an upper plate and a lower plate. The slot engages with the protrusion. The upper plate has a notch for the screw to enter, and the screw is engaged in the notch. The lower surface of the upper plate presses against the top surface of the screw protrusion. The lower plate has a screw hole, which is a through hole. A pre-tightening bolt connects to the screw hole and abuts against the lower surface of the protrusion. The base plate of this mold does not have threaded holes, eliminating the need to consider thread stripping issues later, resulting in a long service life and overcoming the thread stripping phenomenon caused by frequent mold disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to a gas valve seat mold, belonging to the field of die-casting mold technology. Background Technology

[0002] Existing gas valve seats are manufactured using a die-casting process, and the die-casting molds used are, for example... Figure 1 As shown, the mold includes an upper mold, a lower mold, and a base plate. The upper and lower molds are fastened together to form the product cavity. The mold needs to be disassembled for maintenance. Since the base plate and the lower mold are connected by screws, threaded holes are provided on both the base plate and the lower mold. After repeated disassembly and assembly, the threads of the threaded holes on the base plate or the matching threads on the screws are prone to stripping. If the internal threads on the base plate strip, the threaded holes on the base plate must be re-drilled before it can be used again. Since the base plate bears a lot of pressure, it is usually heat-treated. It is more difficult to machine threaded holes on the heat-treated base plate. It requires expensive cutting tools, and the feed rate must be carefully controlled. There is a risk of tool breakage if you are not careful.

[0003] A search revealed that publication number CN200720170966.5 discloses a die-casting mold tie rod and a die-casting mold, and discloses the connection method between the tie rod and the ejector pin rear plate. The method involves first connecting the tie rod to the ejector pin rear plate with a positioning block, and then opening slots on both sides of the tie rod to engage with the notches of the positioning block. However, the positioning block needs to be loosened during disassembly. According to the attached drawings, it is also necessary to drill threaded holes in the ejector pin rear plate for the installation of the positioning block, and the diameter of the threaded hole is smaller than that of the previous tie rod thread. It is known that the smaller the thread diameter and the smaller the tooth profile, the easier it is to strip the thread, which does not fundamentally solve the problem. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a gas valve seat mold that solves the aforementioned deficiencies.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A gas valve seat mold includes a base plate, a lower mold, an upper mold, and four screws for connecting the base plate and the lower mold.

[0007] The base plate has a through hole at the connection position, and the inner wall of the through hole has a protrusion extending towards the axis in the middle.

[0008] The bottom of the screw boss is in contact with the top of the protrusion, and its screw post is connected to the lower mold with the screw facing upward;

[0009] The locking block is engaged with the protrusion, and the locking block has a slot in the middle that opens to one side and forms an upper plate and a lower plate, and the slot engages the protrusion;

[0010] A notch is provided on the side of the upper plate, which is a notch for screws to enter. The screws are locked in the notch, and the lower surface of the upper plate presses against the top surface of the screw protrusion.

[0011] The lower plate is provided with screw holes, which are through holes. Pre-tightening bolts are connected to the screw holes and abut against the lower surface of the protrusion.

[0012] Furthermore, the lower surface of the protrusion has a pre-tightening hole directly above the pre-tightening bolt. The pre-tightening hole is a blind hole, and the pre-tightening bolt extends into the pre-tightening hole.

[0013] Beneficial effects

[0014] The base plate of this mold does not have threaded holes, so there is no need to worry about thread stripping in the future. It has a long service life and overcomes the thread stripping phenomenon caused by frequent disassembly and assembly of the mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of existing technology;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figures 3 to 4 This is a cross-sectional view of the base plate portion of this utility model;

[0018] Figure 5 This is a schematic diagram of the locking block structure of this utility model;

[0019] Figures 6 to 7 This is an axonometric view of the base plate portion of this utility model;

[0020] The diagram is marked as follows:

[0021] 1-Base plate, 2-Lower mold, 3-Screw, 4-Upper mold, 5-Locking block, 6-Pre-tightening bolt;

[0022] 1a - Through hole, 1b - Protrusion, 1ba - Pre-tightening hole;

[0023] 5a - Top plate, 5b - Groove, 5c - Bottom plate;

[0024] 5aa - Bayonet, 5ca - Screw hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 7 This utility model provides a gas valve seat mold, including a base plate 1, a lower mold 2 and an upper mold 4, and 4 screws 3 for connecting the base plate 1 and the lower mold 4;

[0027] Wherein, the base plate 1 is in the connection position (reference) Figure 7 A through hole 1a is provided, which is a rectangular through hole, and a protrusion 1b extending towards the axis is provided in the middle of the inner wall of the through hole 1a.

[0028] The bottom of the boss of screw 3 is in contact with the top of the protrusion 1b, and its screw post is connected to the lower mold 2 with the screw facing upward;

[0029] The locking block 5 is engaged on the protrusion 1b. The locking block 5 has a slot 5b in the middle that opens to one side and forms an upper plate 5a and a lower plate 5c. The slot 5b engages the protrusion 1b.

[0030] The upper plate 5a has a notch 5aa on its side, which is a notch for the screw 3 to enter. The screw 3 is inserted into the notch 5aa, and the lower surface of the upper plate 5a presses against the top surface of the screw 3 protrusion.

[0031] The lower plate 5c is provided with a screw hole 5ca, which is a through hole. The pre-tightening bolt 6 is connected to the screw hole 5ca and abuts against the lower surface of the protrusion 1b. By unscrewing the pre-tightening bolt 6, the locking block 5 can be released, and the screw 3 can be removed. The base plate 1 of this mold does not have a threaded hole, so there is no need to consider the problem of stripping the thread later. It has a long service life and overcomes the problem of thread stripping caused by frequent disassembly and assembly of the mold.

[0032] To prevent the locking block 5 from loosening, the lower surface of the protrusion 1b is provided with a pre-tightening hole 1ba directly above the pre-tightening bolt 6. The pre-tightening hole 1ba is a blind hole, and the pre-tightening bolt 6 extends into the pre-tightening hole 1ba. After the pre-tightening bolt 6 is screwed into the pre-tightening hole 1ba, the back path in all directions is fixed, which can effectively prevent the locking block 5 from loosening.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas valve seat mold, characterized in that, Includes a base plate, a lower mold, an upper mold, and four screws for connecting the base plate and the lower mold; The base plate has a through hole at the connection position, and the inner wall of the through hole has a protrusion extending towards the axis in the middle. The bottom of the screw boss is in contact with the top of the protrusion, and its screw post is connected to the lower mold with the screw facing upward; The locking block is engaged with the protrusion, and the locking block has a slot in the middle that opens to one side and forms an upper plate and a lower plate, and the slot engages the protrusion; A notch is provided on the side of the upper plate, which is a notch for screws to enter. The screws are locked in the notch, and the lower surface of the upper plate presses against the top surface of the screw protrusion. The lower plate is provided with screw holes, which are through holes. Pre-tightening bolts are connected to the screw holes and abut against the lower surface of the protrusion.

2. A gas valve seat mold according to claim 1, characterized in that, The lower surface of the protrusion has a pre-tightening hole directly above the pre-tightening bolt. The pre-tightening hole is a blind hole, and the pre-tightening bolt extends into the pre-tightening hole.

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