Ship silencer shell casting mold

Abstract

The utility model discloses a steamship silencer shell casting mold, which belongs to the technical field of casting molds and comprises a base, a bottom mold plate, a lower outer mold, a lower mold plate, an upper outer mold, an upper mold plate, an insertion rod and an upper mold plate cover plate, the bottom mold plate is assembled on the upper surface of the base, the lower outer mold is sleeved on the outer surface of the bottom mold plate, and the insertion rod is inserted into the upper mold plate cover plate. The lower mold plate is arranged on the inner side of the lower outer mold and located on the bottom mold plate, the upper mold plate is assembled on the upper surface of the lower mold plate, the upper outer mold is connected to the outer side of the upper mold plate in a sleeving mode and located on the upper surface of the lower outer mold, and the upper mold plate cover plate is assembled on the upper mold plate. The casting mold of the steamship silencer shell can be formed through simple splicing, the lifting system is designed on the base and acts on the upper mold plate cover plate, the upper mold plate cover plate is stably separated from a casting, abrasion possibly caused when the upper mold plate cover plate is demolded is avoided, and the percent of pass of the cast casting is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting molds, and in particular provides a casting mold for a ship silencer shell. Background Art

[0002] The ship muffler is an auxiliary device for the exhaust pipes of generators, main engines, fuel boilers, fire-fighting diesel engines and other equipment in ships. Its function is to eliminate the exhaust noise when the equipment is working, and at the same time it can extinguish the sparks remaining in the exhaust pipes.

[0003] The shell of the ship muffler is usually produced by casting due to its special shape and complex structure. However, it is inconvenient to demould after casting. If it is demoulded directly by ejection, it is easy to cause unnecessary damage to the casting due to the friction between the shell surface and the mold. In some cases, such damage is enough to affect the overall performance and service life of the muffler, and thus affect the qualified rate of the casting. Therefore, a casting mold for the ship muffler shell is needed, which is easy to demould complex castings. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a casting mold for a ship muffler shell.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a ship muffler shell casting mold, including a base, a bottom template, a lower outer mold, a lower template, an upper outer mold, an upper template, an insertion rod and an upper template cover plate, the bottom template is assembled on the upper surface of the base, the lower outer mold is sleeved on the outer surface of the bottom template, the lower template is arranged on the inner side of the lower outer mold and is located on the bottom template, the upper template is assembled on the upper surface of the lower template, the upper outer mold is sleeved on the outer side of the upper template and is located on the upper surface of the lower outer mold, the upper end outer peripheral surface of the upper template is provided with an insertion hole, and the insertion rod is inserted into the insertion hole, and the upper template cover plate is assembled on the upper template;

[0006] The left and right sides of the upper surface of the base are equipped with mounting frames and lifting systems, and the lifting system is installed in the mounting frames, the output end of the lifting system is connected to the upper template cover plate, the inner surface of the mounting frame is penetrated by a heating rod assembly, the lower outer mold and the upper outer mold are provided with annular electric heating rods, and the heating rod assembly is connected to the electric heating rods.

[0007] Furthermore, the lifting system includes a hydraulic cylinder and a telescopic plate, the hydraulic cylinder is fixedly mounted on the upper surface of the base and is arranged inside the mounting frame, the telescopic plate is fixedly mounted on the output end of the hydraulic cylinder, the telescopic plate includes a telescopic plate outer plate and a telescopic plate inner plate, and the telescopic plate inner plate is plugged into the inner side of the telescopic plate outer plate, a moving block is fixedly mounted on the upper surface of the telescopic plate inner plate, a sliding groove is provided on the upper surface of the telescopic plate outer plate, and the moving block passes through the sliding groove, the outer surface of the upper template cover plate is symmetrically provided with telescopic plate slots, and the inner end of the telescopic plate inner plate is plugged into the telescopic plate slot.

[0008] Furthermore, vibrators and counterweights are symmetrically fixedly mounted on the front and rear surfaces of the telescopic plate outer plate.

[0009] Furthermore, a mounting block is fixedly mounted on the outer surface of the heating rod assembly, and the mounting block is in the shape of a rectangular parallelepiped, and a square groove matching the mounting block is formed on the outer surface of the mounting frame.

[0010] Furthermore, a positioning block is symmetrically fixed on the upper surface of the base, a positioning groove corresponding to the positioning block is provided on the lower surface of the bottom template, a lower outer mold positioning surface is provided on the outer surface of the bottom template, and a pouring port is provided at a corresponding position on the upper surface of the base and the upper surface of the bottom template.

[0011] Furthermore, the inner surface of the lower outer mold and the inner surface of the upper outer mold are both provided with installation positioning surfaces, the lower surface of the lower outer mold is provided with a step groove, and the inner diameter of the step groove is larger than the inner diameter of the lower outer mold, and the inner surface of the step groove is provided with an inner positioning surface corresponding to the positioning surface of the lower outer mold.

[0012] Furthermore, the outer surface of the lower template, the outer surface of the upper template and the outer surface of the lower end of the upper template cover plate are all provided with mounting surfaces corresponding to the mounting positioning surface.

[0013] Furthermore, a positioning pin is integrally formed on the upper surface of the lower template, and a pin groove corresponding to the positioning pin is formed on the lower surface of the upper template.

[0014] Furthermore, a circular groove is formed at the outer end of the insertion rod, and a pull ring is fixedly installed in the circular groove.

[0015] The beneficial effects of using the utility model are:

[0016] The utility model designs structures such as a bottom template, a lower template, an upper template, and an upper template cover plate, and can form a casting mold for a ship muffler shell through simple splicing, and adopts a low-pressure casting process to smoothly and effectively complete the casting work.

[0017] The utility model designs a lifting system on the base, which acts on the upper template cover plate forming the upper part of the ship muffler shell, so that it can be stably separated from the casting, effectively avoiding the wear and tear that may be caused when the upper template cover plate is demoulded, and improving the qualified rate of the casting.

[0018] The utility model provides a vibrator on the lifting system, which can vibrate the mold and the casting before demoulding, which can effectively reduce the adhesion between the casting and the mold, and release the stress inside the casting, so that the demoulding work can be carried out more smoothly and the success rate of demoulding is improved.

[0019] The utility model provides a heating rod assembly on the mounting frame and is connected with the electric heating rods in the lower outer mold and the upper outer mold, so that the mold can be heated before demoulding, thereby weakening the bonding force between the mold and the casting, so that the demoulding work can be carried out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0021] Figure 2 It is an exploded view of the utility model.

[0022] Figure 3 It is a three-dimensional schematic diagram of the base of the utility model.

[0023] Figure 4 It is a three-dimensional schematic diagram of the bottom template of the utility model.

[0024] Figure 5 It is a three-dimensional schematic diagram of the lower outer mold of the utility model.

[0025] Figure 6 It is a three-dimensional schematic diagram of the upper template of the utility model.

[0026] Figure 7 It is a three-dimensional schematic diagram of the plug rod of the utility model.

[0027] Figure 8 It is a three-dimensional schematic diagram of the upper template cover of the utility model.

[0028] Fig. 9 It is a three-dimensional schematic diagram of the casting of the utility model.

[0029] The accompanying drawings include: 1, base, 11, mounting frame, 12, lifting system, 121, hydraulic cylinder, 122, telescopic plate outer plate, 123, telescopic plate inner plate, 124, moving block, 125, slide groove, 126, vibrator, 127, counterweight block, 13, heating rod assembly, 131, mounting block, 14, positioning block, 15, pouring gate, 2, bottom template, 21, positioning groove, 22, lower outer mold positioning surface, 3, lower outer mold, 31, inner positioning surface, 32, installation positioning surface, 4, lower template, 41, positioning pin, 5, upper outer mold, 6, upper template, 61, pin groove, 7, insertion rod, 71, pull ring, 8, upper template cover. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figures 1 to 8 A ship muffler shell casting mold comprises a base 1, a bottom template 2, a lower outer mold 3, a lower template 4, an upper outer mold 5, an upper template 6, an insertion rod 7 and an upper template cover plate 8. The bottom template 2 is assembled on the upper surface of the base 1, the lower outer mold 3 is sleeved on the outer surface of the bottom template 2, the lower template 4 is arranged on the inner side of the lower outer mold 3 and is located on the bottom template 2, the upper template 6 is assembled on the upper surface of the lower template 4, the upper outer mold 5 is sleeved on the outer side of the upper template 6 and is located on the upper surface of the lower outer mold 3, a plug hole is opened on the outer peripheral surface of the upper end of the upper template 6, and the plug rod 7 is inserted into the plug hole, and the upper template cover plate 8 is assembled on the upper template 6.

[0032] The bottom template 2, the lower template 4, the upper template 6, the insert rod 7 and the upper template cover plate 8 are all sand molds, which are spliced ​​together to form a casting mold.

[0033] The lower outer mold 3 and the upper outer mold 5 are metal molds, which play a role in assisting the positioning of the casting mold. At the same time, the mold can be heated before demoulding to weaken the bonding force between the mold and the casting, so that the demoulding work can proceed smoothly.

[0034] like Fig. 9 As shown, this is a ship muffler housing casting cast in a casting mold.

[0035] like Figures 1 to 3As shown, a mounting frame 11 and a lifting system 12 are installed on both sides of the upper surface of the base 1, and the lifting system 12 is installed in the mounting frame 11, and the output end of the lifting system 12 is connected to the upper template cover 8. A heating rod assembly 13 is installed through the inner surface of the mounting frame 11, and an annular electric heating rod is arranged inside the lower outer mold 3 and the upper outer mold 5, and the heating rod assembly 13 is connected to the electric heating rod.

[0036] Since the upper structure of the ship silencer shell is the most complex, it is provided with multiple ribs, and this part of the structure is formed by the upper template cover plate 8, so the demoulding requirements for the upper template cover plate 8 are relatively high. It is necessary to ensure that the upper template cover plate 8 is moved vertically upward to avoid any tilting that may cause damage to the ship silencer shell. The lifting system 12 is designed to drive the upper template cover plate 8 to move vertically at a uniform and stable speed to complete the demoulding work.

[0037] After the heating rod assembly 13 is connected to the electric heating rod and energized, the casting mold can be heated to weaken the bonding force between the mold and the casting, so that the demoulding work can be carried out smoothly.

[0038] The heating temperature and time must be strictly controlled during heating to avoid thermal damage to the casting material.

[0039] Specifically, if Figure 3 As shown, the lifting system 12 includes a hydraulic cylinder 121 and a telescopic plate. The hydraulic cylinder 121 is fixedly mounted on the upper surface of the base 1 and is arranged inside the mounting frame 11. The telescopic plate is fixedly mounted on the output end of the hydraulic cylinder 121. The telescopic plate includes a telescopic plate outer plate 122 and a telescopic plate inner plate 123, and the telescopic plate inner plate 123 is plugged into the inner side of the telescopic plate outer plate 122. A moving block 124 is fixedly mounted on the upper surface of the telescopic plate inner plate 123. A slide groove 125 is provided on the upper surface of the telescopic plate outer plate 122, and the moving block 124 passes through the slide groove 125. The outer surface of the upper template cover 8 is symmetrically provided with telescopic plate slots, and the inner end of the telescopic plate inner plate 123 is plugged into the telescopic plate slot.

[0040] The inner plate 123 of the telescopic plate is initially located entirely inside the outer plate 122 of the telescopic plate. After the casting mold is installed, the inner plate 123 of the telescopic plate is moved out by moving the moving block 124 and inserted into the telescopic plate slot to complete the connection between the lifting system 12 and the upper template cover 8. In addition, the telescopic plate can be moved downward by operating the hydraulic cylinder 121 to ensure that each template in the casting mold fits tightly.

[0041] Specifically, if Figure 3 As shown, a vibrator 126 and a counterweight 127 are symmetrically fixedly mounted on the front and rear surfaces of the telescopic plate outer plate 122 .

[0042] The operation of the vibrator 126 can drive the telescopic plate, the casting mold and the casting to vibrate at a high frequency, which will reduce the adhesion between the casting and the mold, and at the same time release the stress inside the casting. This relative movement and stress release will help the casting to be separated from the mold smoothly.

[0043] The counterweight block 127 is arranged to make the weights on both sides of the telescopic plate the same, thereby ensuring the stable lifting movement thereof.

[0044] Specifically, if Figure 3 As shown, a mounting block 131 is fixedly mounted on the outer surface of the heating rod assembly 13 , and the mounting block 131 is in the shape of a cuboid, and a square groove matching the mounting block 131 is formed on the outer surface of the mounting frame 11 .

[0045] The side surfaces of the lower outer mold 3 and the upper outer mold 5 are both provided with grooves communicating with the electric heating rods. The heating rod assembly 13 can be connected to the electric heating rods by being inserted into the grooves.

[0046] The mounting block 131 and the square groove are in an interference fit connection relationship.

[0047] A hole is formed on the outer surface of the mounting frame 11, and the heating rod assembly 13 can move in the hole. The cooperation between the mounting block 131 and the square groove can limit the position of the heating rod assembly 13, ensure that the heating rod assembly 13 is connected to the electric heating rod, and prevent the heating rod assembly 13 from rotating after installation.

[0048] Specifically, if Figure 3 and Figure 4 As shown, a positioning block 14 is symmetrically fixedly installed on the upper surface of the base 1, a positioning groove 21 corresponding to the positioning block 14 is opened on the lower surface of the bottom template 2, a lower outer mold positioning surface 22 is opened on the outer surface of the bottom template 2, and a pouring port 15 is opened at a corresponding position between the upper surface of the base 1 and the upper surface of the bottom template 2.

[0049] The bottom template 2 is positioned and installed on the base 1 through the cooperation between the positioning groove 21 and the positioning block 14 .

[0050] The molten metal is injected into the mold cavity through the pouring port 15. The pouring port corresponds to the position of the three supporting columns in the middle of the ship silencer shell, which can ensure that the molten metal can be smoothly filled in the mold cavity.

[0051] Specifically, if Figure 5 As shown, the inner surface of the lower outer mold 3 and the inner surface of the upper outer mold 5 are both provided with an installation positioning surface 32, the lower surface of the lower outer mold 3 is provided with a step groove, and the inner diameter of the step groove is larger than the inner diameter of the lower outer mold 3, and the inner surface of the step groove is provided with an inner positioning surface 31 corresponding to the lower outer mold positioning surface 22.

[0052] The positioning and installation of the lower outer mold 3 on the bottom mold plate 2 is achieved through the cooperation between the inner positioning surface 31 and the lower outer mold positioning surface 22 .

[0053] Specifically, if Figure 2 and Figure 8 As shown, the outer surface of the lower template 4 , the outer surface of the upper template 6 and the outer surface of the lower end of the upper template cover plate 8 are all provided with mounting surfaces corresponding to the mounting positioning surface 32 .

[0054] The lower template 4 is installed above the inner bottom template 2 of the lower outer mold 3 by the cooperation between the installation surface and the installation positioning surface 32 .

[0055] Specifically, if Figure 2 and Figure 6 As shown, a positioning pin 41 is integrally formed on the upper surface of the lower template 4 , and a pin groove 61 corresponding to the positioning pin 41 is formed on the lower surface of the upper template 6 .

[0056] The upper template 6 and the lower template 4 are installed by the cooperation of the positioning pin 41 and the pin groove 61 .

[0057] The installation of the upper outer mold 5 and the upper mold plate 6 is achieved by the cooperation of the installation positioning surface 32 on the upper outer mold 5 and the installation surface on the upper mold plate 6 .

[0058] The installation of the upper template cover plate 8 is completed by the installation surface on the upper template cover plate 8 cooperating with the installation positioning surface 32 on the upper outer mold 5 .

[0059] Specifically, if Figure 7 As shown, a circular groove is formed at the outer end of the insertion rod 7, and a pull ring 71 is fixedly installed in the circular groove.

[0060] During the demoulding process, the insertion rod 7 can be taken out by pulling the pull ring 71 with a tool.

[0061] The demoulding operation steps of the ship muffler shell casting mold are as follows:

[0062] Step 1: operate the vibrator 126 to vibrate the casting mold and the casting at a high frequency, and at the same time, energize the heating rod assembly 13 to heat the casting mold. After the set time is reached, stop the vibrator 126 and de-energize the heating rod assembly 13;

[0063] Step 2: operate the hydraulic cylinder 121 to drive the upper template cover plate 8 to move upward at a uniform and stable speed to realize demoulding of the upper template cover plate 8. When the upper template cover plate 8 is completely moved out, manually move the telescopic plate inner plate 123 into the telescopic plate outer plate 122, and take out the upper template cover plate 8;

[0064] Step 3, move the heating rod assembly 13 outward and remove it from the grooves of the lower outer mold 3 and the upper outer mold 5, and then the lower outer mold 3 and the upper outer mold 5 can be taken out;

[0065] Step 4: Use a tool to pull the pull ring 71 to remove the insertion rod 7;

[0066] Step five, take out the casting, lower template 4 and upper template 6 as a whole, then take out the lower template 4 and upper template 6 by digging out, water spraying and other methods, clean the surface of the casting, and complete the demoulding work to obtain the casting.

[0067] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A casting mold for a ship muffler shell, characterized in that: It includes a base, a bottom template, a lower outer template, a lower template, an upper outer template, an upper template, an insertion rod and an upper template cover plate, wherein the bottom template is assembled on the upper surface of the base, the lower outer template is sleeved on the outer surface of the bottom template, the lower template is arranged on the inner side of the lower outer template and is located on the bottom template, the upper template is assembled on the upper surface of the lower template, the upper outer template is sleeved on the outer side of the upper template and is located on the upper surface of the lower outer template, an insertion hole is opened on the outer peripheral surface of the upper end of the upper template, and the insertion rod is inserted into the insertion hole, and the upper template cover plate is assembled on the upper template; The upper surface of the base is equipped with a mounting frame and a lifting system on both sides, and the lifting system is installed in the mounting frame, the output end of the lifting system is connected to the upper template cover plate, the inner surface of the mounting frame is penetrated by a heating rod assembly, the lower outer mold and the upper outer mold are provided with an annular electric heating rod, and the heating rod assembly is connected to the electric heating rod; The lifting system includes a hydraulic cylinder and a telescopic plate, wherein the hydraulic cylinder is fixedly mounted on the upper surface of the base and arranged inside the mounting frame, and the telescopic plate is fixedly mounted on the output end of the hydraulic cylinder, and the telescopic plate includes a telescopic plate outer plate and a telescopic plate inner plate, and the telescopic plate inner plate is plugged into the inner side of the telescopic plate outer plate, and a moving block is fixedly mounted on the upper surface of the telescopic plate inner plate, and a slide groove is provided on the upper surface of the telescopic plate outer plate, and the moving block passes through the slide groove, and the outer surface of the upper template cover plate is symmetrically provided with telescopic plate slots, and the inner end of the telescopic plate inner plate is plugged into the telescopic plate slot; Vibrators and counterweights are symmetrically fixedly mounted on the front and rear surfaces of the telescopic plate outer plate.

2. A ship muffler shell casting mold according to claim 1, characterized in that: A mounting block is fixedly mounted on the outer surface of the heating rod assembly, and the mounting block is in the shape of a rectangular parallelepiped. A square groove matching the mounting block is formed on the outer surface of the mounting frame.

3. A ship muffler shell casting mold according to claim 1, characterized in that: A positioning block is fixedly installed symmetrically on the upper surface of the base, a positioning groove corresponding to the positioning block is opened on the lower surface of the bottom template, a lower outer mold positioning surface is opened on the outer surface of the bottom template, and a pouring port is opened at a corresponding position between the upper surface of the base and the upper surface of the bottom template.

4. A ship muffler shell casting mold according to claim 3, characterized in that: The inner surface of the lower outer mold and the inner surface of the upper outer mold are both provided with installation positioning surfaces, the lower surface of the lower outer mold is provided with a step groove, and the inner diameter of the step groove is larger than the inner diameter of the lower outer mold, and the inner surface of the step groove is provided with an inner positioning surface corresponding to the positioning surface of the lower outer mold.

5. A ship muffler shell casting mold according to claim 4, characterized in that: The outer surface of the lower template, the outer surface of the upper template and the outer surface of the lower end of the upper template cover plate are all provided with mounting surfaces corresponding to the mounting positioning surface.

6. The ship muffler shell casting mold according to claim 1, characterized in that: A positioning pin is integrally formed on the upper surface of the lower template, and a pin groove corresponding to the positioning pin is opened on the lower surface of the upper template.

7. The ship muffler shell casting mold according to claim 1, characterized in that: A circular groove is formed at the outer end of the insertion rod, and a pull ring is fixedly installed in the circular groove.

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