Fixing structure for runner sand core of gas exhaust shell
In the production of gas exhaust shell, the welding between the first core bone and the second core bone is used to fix the runner sand core, and the problems of large and large seams of the casting runner are solved, achieving a more efficient production process and better product quality.
Patent Information
- Application Number
- CN202420520382.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-18
AI Technical Summary
In the production of gas exhaust shells, the casting runner joints are large and there are many joints, which makes it difficult to clean the casting joints, affecting production efficiency and delivery cycle.
A fixed structure of the runner sand core of the gas exhaust shell is adopted. By forming a welding cooperation between the first core bone and the second core bone during the production process, the runner sand core is fixed, and the casting wall thickness is not qualified and the occurrence of blank joints is avoided.
It ensures the integrity and finish of the runner sand core, reduces the casting joints inside the runner, reduces the difficulty of running passage cleaning, and improves the production efficiency of the gas exhaust shell.
Smart Images
Figure CN222552094U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand casting, in particular to a fixing structure of a sand core of a gas exhaust shell flow channel. Background Art
[0002] When producing the gas exhaust shell flow channel, there must be no casting blank seams inside. However, in the production of the gas exhaust shell, the casting flow channel blank seams are large and numerous, and it is time-consuming and laborious to grind and clean the casting blank seams.
[0003] Two molds are made by dividing the flow channel into two, raw materials are poured into the two molds respectively, and two sand cores are obtained after the raw materials are self-hardened and formed. The two sand cores are combined to obtain the corresponding flow channel sand core.
[0004] However, after using two sand cores to combine to obtain the runner sand core, there must be a gap between the joint surfaces of the two sand cores, so there must be a blank seam in the cast casting runner. In addition, the inner cavity of the runner is blocked by the remaining structure of the casting in terms of vision and space. The blank seam of the casting is extremely difficult to clean, which affects the production efficiency and delivery cycle of the gas exhaust shell. Summary of the invention
[0005] The utility model aims to provide a fixing structure of a sand core of a gas exhaust shell flow channel, which solves the problem of flow channel blank seams of the gas exhaust shell in the prior art, thereby affecting the production efficiency of the gas exhaust shell.
[0006] To achieve the above-mentioned purpose, the utility model provides a fixing structure of a gas exhaust casing flow channel sand core, including a flow channel sand core, an air inlet sand core, a first core bone, a second core bone, a welding window, a lower box sand mold, an upper box sand mold, a welding area, a casting cavity, a lower box sand mold lower core head, a lower box sand mold upper core head, an exhaust port upper core head and an exhaust port lower core head, the air inlet sand core is arranged above the lower box sand mold, the lower box sand mold lower core head is arranged between the air inlet sand core and the lower box sand mold, the lower box sand mold lower core head is arranged between the lower box sand mold and the upper box sand mold, the flow channel sand core is arranged above the air inlet sand core and the lower box sand mold, and the inlet An air inlet stop is provided between the air inlet sand core and the flow channel sand core, the exhaust port lower core head is arranged between the lower box sand mold and the flow channel sand core, the exhaust port upper core head is arranged between the flow channel sand core and the upper box sand mold, the upper box sand mold is arranged above the lower box sand mold and the flow channel sand core, the welding window is arranged between the air inlet sand core and the flow channel sand core, the first core bone is arranged inside the air inlet sand core, the second core bone is arranged inside the flow channel sand core, the welding area is arranged between the first core bone and the second core bone, and an air inlet force surface is provided between the air inlet sand core and the upper box sand mold.
[0007] Wherein, the first core bar and the second core bar are T-shaped ductile iron cast by casting.
[0008] Wherein, the air inlet sand core is made of furan resin sand, and the first core bone is pre-buried inside the air inlet sand core.
[0009] Wherein, the flow channel sand core is made of furan resin sand, and the second core bone is pre-buried inside the flow channel sand core.
[0010] There are four first core bones and four second core bones, which are evenly distributed inside the air inlet sand core and the flow channel sand core.
[0011] Wherein, the air inlet stop is positioned to match the gap between the flow channel sand core and the air inlet sand core.
[0012] Among them, the number of upper core heads of the lower box sand mold is three, which are equidistantly distributed on the upper box sand mold and the lower box sand mold.
[0013] The utility model provides a fixing structure of a gas exhaust casing flow channel sand core. During the production process, a welding fit is formed between the first core bone and the second core bone. The flow channel sand core is fixed through the fitting relationship, which ensures that the flow channel sand core does not float up under the action of molten iron to obtain a qualified casting wall thickness. At the same time, the integrity and smoothness of the flow channel sand core are ensured, and the casting blank seam caused by the traditional parting method inside the flow channel is avoided, which greatly reduces the difficulty of flow channel cleaning and improves the production efficiency of the gas exhaust casing. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0015] Figure 1 It is a schematic diagram of a method for fixing a flow channel sand core of a gas exhaust shell according to the present invention.
[0016] Figure 2 It is a schematic structural diagram of the first core bone and the second core bone of the present invention.
[0017] 11-flow channel sand core, 12-air inlet sand core, 21-first core bone, 22-second core bone, 31-welding window, 41-lower box sand mold, 42-upper box sand mold, 51-welding area, 61-air inlet stress surface, 71-casting cavity, 81-lower box sand mold lower core head, 82-lower box sand mold upper core head, 83-exhaust port upper core head, 84-air inlet sand core stop positioning, 85-exhaust port lower core head. DETAILED DESCRIPTION
[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.
[0019] See also Figure 1 and Figure 2 The utility model provides a fixing structure of a gas exhaust shell flow channel sand core 11, comprising a flow channel sand core 11, an air inlet sand core 12, a first core bone 21, a second core bone 22, a welding window 31, a lower box sand mold 41, an upper box sand mold 42, a welding area 51, a casting cavity 71, a lower box sand mold lower core head 81, a lower box sand mold upper core head 82, an exhaust port upper core head 83 and an exhaust port lower core head 85, wherein the air inlet sand core 12 is arranged above the lower box sand mold 41, the lower box sand mold lower core head 81 is arranged between the air inlet sand core 12 and the lower box sand mold 41, the lower box sand mold lower core head 81 is arranged between the lower box sand mold 41 and the upper box sand mold 42, the flow channel sand core 11 is arranged above the air inlet sand core 12 and the lower box sand mold 41, the air inlet sand mold An air inlet stop is provided between the core 12 and the flow channel sand core 11, the exhaust port lower core head 85 is arranged between the lower box sand mold 41 and the flow channel sand core 11, the exhaust port upper core head 83 is arranged between the flow channel sand core 11 and the upper box sand mold 42, the upper box sand mold 42 is arranged above the lower box sand mold 41 and the flow channel sand core 11, the welding window 31 is arranged between the air inlet sand core 12 and the flow channel sand core 11, the first core bone 21 is arranged inside the air inlet sand core 12, the second core bone 22 is arranged inside the flow channel sand core 11, the welding area 51 is arranged between the first core bone 21 and the second core bone 22, and an air inlet force surface 61 is provided between the air inlet sand core 12 and the upper box sand mold 42.
[0020] In this embodiment, the lower box sand mold 41 and the upper box sand mold 42 are two-box molds, the upper core head of the lower box, the lower core head of the lower box, the upper core head 83 of the exhaust port, the lower core head 85 of the exhaust port and the force surface 61 of the air inlet form a positioning support fit, the upper core head of the lower box, the lower core head of the lower box, the upper core head 83 of the exhaust port, the lower core head 85 of the exhaust port and the force surface 61 of the air inlet form a positioning compression fit, the first core bone 21 forms a compression fit with the air inlet sand core 12, the The second core bone 22 forms a press fit with the flow channel sand core 11, and the first core bone 21 and the second core bone 22 form a welding fit. The flow channel sand core 11 is fixed through the matching relationship, ensuring that the flow channel sand core 11 does not float under the action of molten iron, thereby obtaining a qualified casting wall thickness, while also ensuring the integrity and smoothness of the flow channel sand core 11, avoiding the casting gap caused by the traditional parting method inside the flow channel, greatly reducing the difficulty of flow channel cleaning, and improving the production efficiency of the gas exhaust shell;
[0021] The mold of the runner sand core 11 is a wooden mold, and the difficult-to-demand part of the runner mold is an epoxy resin mold. The difficult-to-demand part is divided into several small blocks with an arc length not exceeding 150 mm, and the epoxy resin mold is used for molding and rotation demolding;
[0022] After the furan resin sand of the air inlet sand core 12 and the flow channel sand core 11 is filled, the resin sand at the position of the welding window 31 is removed to leave a visible window and space for subsequent welding.
[0023] Furthermore, the first core bar 21 and the second core bar 22 are T-shaped ductile iron cast by casting.
[0024] Furthermore, the air inlet sand core 12 is made of furan resin sand, and the first core bone 21 is pre-buried inside the air inlet sand core 12 .
[0025] Furthermore, the flow channel sand core 11 is made of furan resin sand, and the second core bone 22 is pre-buried inside the flow channel sand core 11 .
[0026] Furthermore, the number of the first core bones 21 and the number of the second core bones 22 are both four, and they are evenly distributed inside the air inlet sand core 12 and the flow channel sand core 11 circumferentially.
[0027] Furthermore, the air inlet stop is positioned to be gap-matched with the flow channel sand core 11 and the air inlet sand core 12 .
[0028] In this embodiment, the air inlet stop is positioned to cooperate with the gap between the flow channel sand core 11 and the air inlet sand core 12 , so as to position the flow channel sand core 11 .
[0029] Furthermore, the number of the upper core heads 82 of the lower sand mold is three, which are equidistantly distributed on the upper sand mold 42 and the lower sand mold 41 .
[0030] In this embodiment, the three corners of the upper sand mold 42 and the lower sand mold 41 are equidistantly distributed to play a positioning role.
[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A fixing structure for a sand core of a gas exhaust casing flow channel, characterized in that: The invention comprises a flow channel sand core, an air inlet sand core, a first core bone, a second core bone, a welding window, a lower box sand mold, an upper box sand mold, a welding area, a casting cavity, a lower box sand mold lower core head, a lower box sand mold upper core head, an exhaust port upper core head and an exhaust port lower core head, wherein the air inlet sand core is arranged above the lower box sand mold, the lower box sand mold lower core head is arranged between the air inlet sand core and the lower box sand mold, the lower box sand mold lower core head is arranged between the lower box sand mold and the upper box sand mold, the flow channel sand core is arranged above the air inlet sand core and the lower box sand mold, and an air inlet is provided between the air inlet sand core and the flow channel sand core The air port stop is positioned, the lower core head of the exhaust port is arranged between the lower box sand mold and the runner sand core, the upper core head of the exhaust port is arranged between the runner sand core and the upper box sand mold, the upper box sand mold is arranged above the lower box sand mold and the runner sand core, the welding window is arranged between the air inlet sand core and the runner sand core, the first core bone is arranged inside the air inlet sand core, the second core bone is arranged inside the runner sand core, the welding area is arranged between the first core bone and the second core bone, and an air inlet force surface is provided between the air inlet sand core and the upper box sand mold.
2. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 1, characterized in that: The first core bar and the second core bar are T-shaped ductile iron formed by casting.
3. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 2, characterized in that: The air inlet sand core is made of furan resin sand, and the first core bone is pre-buried inside the air inlet sand core.
4. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 3, characterized in that: The flow channel sand core is made of furan resin sand, and the second core bone is pre-buried inside the flow channel sand core.
5. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 4, characterized in that: The number of the first core bones and the number of the second core bones are both four, and the circumferences are evenly distributed inside the air inlet sand core and the flow channel sand core.
6. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 5, characterized in that: The air inlet stop is positioned to match the gap between the flow channel sand core and the air inlet sand core.
7. The fixing structure of the sand core of the gas exhaust casing flow channel according to claim 6, characterized in that: The number of the upper core heads of the lower box sand mold is three, which are equidistantly distributed on the upper box sand mold and the lower box sand mold.