Injection molding machine for cast iron well lid

Abstract

The utility model belongs to the technical field of molding machines, in particular to an injection molding machine of a cast iron well lid, which comprises an injection molding machine, a feed inlet and a storage bin, a feed transition groove is arranged in the injection molding machine, the inner wall of the feed transition groove is rotatably connected with a rotating shaft, the side wall of the rotating shaft is fixedly connected with three space partition plates, and the space partition plates are arranged in the feed transition groove. A plurality of humidity sensors are mounted on the two sides of each of the three space partition plates, and an arc-shaped heating plate is mounted on the inner wall of the feeding transition groove; the three independent spaces are formed through the three space partition plates, so that the feeding port and the storage bin cannot be directly communicated, molding sand in the three independent spaces is stirred, detected and heated in sequence to take out moisture, and therefore the molding sand with the high humidity can be subjected to moisture reduction treatment; the humidity of the molding sand raw materials entering the storage bin can reach the required equilibrium condition, sand mold manufacturing is facilitated, and the quality of the cast iron well lid is prevented from being affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of molding machines, and in particular relates to an injection molding machine for cast iron manhole covers. Background Art

[0002] Cast iron manhole covers are a common product in urban infrastructure, usually used to cover drains, wells or other places that need to be flatly covered. Cast iron manhole covers are divided into ductile iron manhole covers and gray cast iron manhole covers;

[0003] Sand molds are needed in the casting process of manhole covers, so an injection molding machine is needed to make sand molds. When the injection molding machine supports the sand mold, the raw materials used for the sand mold need to be filled in the internal storage box. The humidity of the raw materials when making sand molds will have a significant impact on the quality of the final molded parts. Appropriate humidity is conducive to the compact molding of sand inside the mold, and at the same time it can improve the adhesion and plasticity of the molding sand, but too high or too low humidity may cause problems. Excessive humidity will cause the sand to adhere to the mold surface and make it difficult to demold. It is also easy to cause bubbles and pores, affecting the surface quality and density of the final parts. However, when putting raw materials into the storage space of the equipment, it is necessary to open a gap to open the storage space, so that the storage space can exchange air with the external space, causing the humidity inside the storage space to change, affecting the subsequent use of the sand mold raw materials inside the storage space. Utility Model Content

[0004] The utility model provides an injection molding machine for a cast iron manhole cover, which has the characteristic of solving the problem that the molding sand raw material is easily affected by the external air humidity and thus becomes damp.

[0005] The utility model provides the following technical solution: it includes an injection molding machine, a feed port and a storage bin, the injection molding machine is provided with a feed transition groove, the feed port is connected with the internal space of the storage bin through the feed transition groove, the inner wall of the feed transition groove is rotatably connected with a rotating shaft, the side wall of the rotating shaft is fixedly connected with three space dividing plates, the three space dividing plates are all slidably connected to the inner wall of the feed transition groove, a number of humidity sensors are installed on both sides of the three space dividing plates, the inner wall of the feed transition groove is installed with an arc heating plate, the three space dividing plates are all slidably connected to one side of the arc heating plate, and a stirring assembly is arranged between every two of the space dividing plates.

[0006] Among them, the stirring assembly includes a rotating rod and two "L"-shaped stirring rods, three drive motors are installed on the side wall of the rotating shaft, the three drive motors are all located between the corresponding two space dividing plates, the rotating rod is fixedly connected to the corresponding drive motor output end, and the "L"-shaped stirring rod is fixedly connected to the corresponding side wall of the rotating rod.

[0007] Among them, a "U"-shaped stirring rod is fixedly connected to one side of the "L"-shaped stirring rod, and both the "L"-shaped stirring rod and the "U"-shaped stirring rod are not in contact with the space dividing plate and the feed transition groove.

[0008] Wherein, a moisture filter is installed inside the injection molding machine, and both ends of the moisture filter are connected to the internal space of the feed transition groove.

[0009] Among them, a touch pressure switch corresponding to the moisture filter is installed on the inner wall of the feed transition groove, and the three space dividing plates are all slidably connected to one end of the touch pressure switch.

[0010] The beneficial effect of the utility model is that three separate spaces are formed by three space dividing plates, so that the feed port and the storage bin cannot be directly connected, and the molding sand inside the three separate spaces is stirred, tested and heated in sequence to remove moisture, so that the molding sand with high humidity can be treated to reduce the moisture, and the humidity of the molding sand raw materials entering the storage bin can reach the required balanced condition, which is beneficial to the production of sand molds and avoids affecting the quality of the cast iron manhole cover.

[0011] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0014] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0015] Figure 4 It is a three-dimensional enlarged structural schematic diagram of components such as the rotating shaft in the utility model.

[0016] In the figure: 1. injection molding machine; 11. feed port; 12. storage bin; 13. feed transition trough; 14. arc heating plate; 2. rotating shaft; 21. space divider; 22. humidity sensor; 3. stirring assembly; 31. rotating rod; 32. "L" type stirring rod; 33. driving motor; 34. "U" type stirring rod; 4. moisture filter; 41. touch pressure switch. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 4The utility model provides the following technical solutions: it includes an injection molding machine 1, a feed port 11 and a storage bin 12, a feed transition groove 13 is opened in the injection molding machine 1, the feed port 11 is connected with the internal space of the storage bin 12 through the feed transition groove 13, the inner wall of the feed transition groove 13 is rotatably connected with a rotating shaft 2, and the side wall of the rotating shaft 2 is fixedly connected with three space dividing plates 21, the three space dividing plates 21 are all slidably connected to the inner wall of the feed transition groove 13, and a number of humidity sensors 22 are installed on both sides of the three space dividing plates 21, an arc heating plate 14 is installed on the inner wall of the feed transition groove 13, the three space dividing plates 21 are all slidably connected to one side of the arc heating plate 14, and a stirring component 3 is arranged between every two space dividing plates 21.

[0018] The material storage bin 12 is used to store the molding sand raw materials for use by the sandblasting equipment below; the feeding transition slot 13 is located between the feeding port 11 and the storage bin 12; the feeding transition slot 13 performs transition processing on the molding sand raw materials fed into the storage bin 12; the rotating shaft 2 is driven to rotate by a motor on one side of the injection molding machine 1, so that the rotating shaft 2 can drive the three space dividing plates 21 to rotate synchronously; the three space dividing plates 21 form three separated and independent spaces; the space between every two space dividing plates 21 can respectively block or open the opening of the feeding port 11 and the opening of the storage bin 12, so that the feeding port 11 and the storage bin 12 cannot be directly connected; when the space between the two space dividing plates 21 is aligned with the feeding port 11, the raw materials lowered from the feeding port 11 enter the two space dividing plates The plates 21 are between the plates 21, and as the rotating shaft 2 drives the space dividing plate 21 to rotate, the space dividing plate 21 can drive the raw materials to the corresponding position of the arc heating plate 14, and the molding sand raw materials are broken up by the stirring component 3 between the two space dividing plates 21, so as to prevent the molding sand from agglomerating. The molding sand raw materials are subsequently used on the edge, and then the molding sand humidity is detected by several humidity sensors 22 on the space dividing plate 21. When the humidity of the molding sand is detected to be high, the arc heating plate 14 is controlled to heat the molding sand. As the stirring component 3 stirs the molding sand, the molding sand with high humidity can be treated to reduce moisture. Subsequently, when the space dividing plate 21 drives the treated molding sand to rotate to the opening position of the storage bin 12, the molding sand is affected by gravity and slides into the storage bin 12, so that the humidity of the molding sand raw materials entering the storage bin 12 can reach the required balanced condition, which is beneficial to the production of sand molds and avoids the quality of the cast iron manhole cover being affected.

[0019] The stirring assembly 3 includes a rotating rod 31 and two "L"-shaped stirring rods 32. Three drive motors 33 are installed on the side wall of the rotating shaft 2. The three drive motors 33 are all located between the corresponding two space dividing plates 21. The rotating rod 31 is fixedly connected to the output end of the corresponding drive motor 33, and the "L"-shaped stirring rod 32 is fixedly connected to the side wall of the corresponding rotating rod 31; the stirring assembly 3 drives the two "L"-shaped stirring rods 32 to rotate through the rotating rod 31, thereby realizing the ability to stir and break up the molding sand raw materials between the two space dividing plates 21. The rotating shaft 2 supports and rotates the three drive motors 33, and the drive motors 33 support and drive the corresponding rotating rods 31. The drive motor 33 drives the corresponding two "L"-shaped stirring rods 32 to rotate and stir through the rotating rod 31.

[0020] A "U"-shaped stirring rod 34 is fixedly connected to one side of the "L"-shaped stirring rod 32, and both the "L"-shaped stirring rod 32 and the "U"-shaped stirring rod 34 are not in contact with the space dividing plate 21 and the feeding transition groove 13; the "L"-shaped stirring rod 32 supports and drives the corresponding "U"-shaped stirring rod 34, so that the "U"-shaped stirring rod 34 can cooperate with the "L"-shaped stirring rod 32 to improve the effect of stirring and breaking up the molding sand, and the "L"-shaped stirring rod 32 and the "U"-shaped stirring rod 34 will not be disturbed by the feeding transition groove 13 and the space dividing plate 21 during the rotation operation.

[0021] A moisture filter 4 is installed inside the injection molding machine 1, and both ends of the moisture filter 4 are connected to the internal space of the feed transition groove 13; when the space between the two space dividing plates 21 reaches the corresponding position of the moisture filter 4, the molding sand in the space is released into the storage bin 12. The air in the space is extracted and discharged by controlling the moisture filter 4 at both ends, so that the residual moisture in the space can be filtered by the moisture filter 4 to avoid the fusion and superposition of moisture with new molding sand raw materials, resulting in a situation with more moisture.

[0022] A touch pressure switch 41 corresponding to the moisture filter 4 is installed on the inner wall of the feed transition groove 13, and the three space dividing plates 21 are all slidably connected to one end of the touch pressure switch 41; when the touch pressure switch 41 is pressed, it can trigger the moisture filter 4 to start working. When the space dividing plate 21 rotates to the position of the touch pressure switch 41, the space dividing plate 21 contacts and squeezes one end of the touch pressure switch 41, so that the touch pressure switch 41 can be touched, thereby enabling the moisture filter 4 to start the moisture filtering work.

[0023] The working principle and use process of the utility model are as follows: the molding sand raw material is put into the device through the feed port 11, and the two space dividing plates 21 carry the molding sand raw material, and then the rotating shaft 2 drives the three space dividing plates 21 to rotate, and the space dividing plates 21 drive the molding sand raw material to rotate to the position of the arc heating plate 14, and then the driving motor 33 is controlled to drive the corresponding rotating rod 31 to rotate, and the rotating rod 31 drives the corresponding two "L"-shaped stirring rods 32 to rotate, and the "L"-shaped stirring rod 32 drives the "U"-shaped stirring rod 34 to rotate, and the "L"-shaped stirring rod 32 and the "U"-shaped stirring rod 34 stir the molding sand raw material in the space between the two space dividing plates 21, and then the moisture condition of the molding sand raw material is sensed according to the humidity sensor 22 on the space dividing plate 21 to determine whether to start the heating work of the arc heating plate 14, and when the humidity of the molding sand is detected to be high, the control The arc-shaped heating plate 14 heats the molding sand, and as the stirring assembly 3 stirs the molding sand, the molding sand with high humidity can be treated to reduce its moisture. Subsequently, when the space dividing plate 21 drives the treated molding sand to rotate to the opening position of the storage bin 12, the molding sand is affected by gravity and slides into the storage bin 12, so that the moisture of the molding sand raw materials entering the storage bin 12 can reach the required equilibrium condition, which is beneficial to the production of sand molds and avoids affecting the quality of the cast iron manhole cover. Subsequently, the space dividing plate 21 rotates to the position of the touch pressure switch 41 to squeeze the touch pressure switch 41, triggering the moisture filter 4 to start working. The moisture filter 4 extracts and discharges the air in the space at both ends, so that the residual moisture in the space can be filtered by the moisture filter 4 to avoid the fusion and superposition of moisture with new molding sand raw materials, resulting in a situation with more moisture, and the cycle is repeated.

Claims

1. An injection molding machine for a cast iron manhole cover, comprising an injection molding machine (1), a feed inlet (11) and a storage bin (12), characterized in that: The injection molding machine (1) is provided with a feed transition groove (13), and the feed port (11) is connected to the internal space of the storage bin (12) through the feed transition groove (13). The inner wall of the feed transition groove (13) is rotatably connected to a rotating shaft (2), and the side wall of the rotating shaft (2) is fixedly connected to three space dividing plates (21), and the three space dividing plates (21) are all slidably connected to the inner wall of the feed transition groove (13). A plurality of humidity sensors (22) are installed on both sides of the three space dividing plates (21). The inner wall of the feed transition groove (13) is installed with an arc heating plate (14), and the three space dividing plates (21) are all slidably connected to one side of the arc heating plate (14), and a stirring assembly (3) is provided between every two of the space dividing plates (21).

2. The injection molding machine for cast iron manhole covers according to claim 1, characterized in that: The stirring assembly (3) comprises a rotating rod (31) and two "L"-shaped stirring rods (32); three driving motors (33) are installed on the side wall of the rotating shaft (2); the three driving motors (33) are located between the corresponding two space dividing plates (21); the rotating rod (31) is fixedly connected to the output end of the corresponding driving motor (33); and the "L"-shaped stirring rod (32) is fixedly connected to the side wall of the corresponding rotating rod (31).

3. The injection molding machine for cast iron manhole covers according to claim 2, characterized in that: A "U"-shaped stirring rod (34) is fixedly connected to one side of the "L"-shaped stirring rod (32), and both the "L"-shaped stirring rod (32) and the "U"-shaped stirring rod (34) are not in contact with the space dividing plate (21) and the feed transition groove (13).

4. The injection molding machine for cast iron manhole covers according to claim 1, characterized in that: A moisture filter (4) is installed inside the injection molding machine (1), and both ends of the moisture filter (4) are connected to the internal space of the feed transition groove (13).

5. The injection molding machine for cast iron manhole covers according to claim 4, characterized in that: A touch-pressure switch (41) corresponding to the moisture filter (4) is installed on the inner wall of the feed transition groove (13), and the three space dividing plates (21) are all slidably connected to one end of the touch-pressure switch (41).

Images