Template conversion device for multi-station nodular cast iron pipe fitting molding machine

Abstract

The invention discloses a template conversion device for a multi-station nodular cast iron pipe fitting molding machine, which comprises a heavy rotary table, a plurality of stations of templates for casting molding are mounted on the heavy rotary table, the heavy rotary table comprises a rotary table fixing seat and a rotary table rotating surface capable of rotating relative to the rotary table fixing seat, and a sealing element is arranged between the rotary table fixing seat and the rotary table rotating surface; a transition installation plate is installed on the top of the rotating face of the rotating disc, a plurality of detachable formwork installation frames are arranged on the top of the transition installation plate, the outer ends of the formwork installation frames extend outwards from the edge of the transition installation plate, and formworks are installed on the extending portions of the formwork installation frames. The template conversion device for the multi-station nodular cast iron pipe fitting molding machine can prevent sand grains from entering the heavy rotary table to cause damage in the molding process.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to a template conversion device for a multi-station ductile iron pipe fitting molding machine. Background Art

[0002] The template turntable is usually driven by a hydraulic cylinder. Due to the compressibility of the hydraulic oil and the clearance of the turntable mechanism, the template is often not positioned accurately. After it is in place, it must be locked by other mechanisms to ensure that the turntable does not deflect when the hydraulic cylinder is withdrawn. At the same time, if the template conversion is realized at 4 stations, the mechanical structure and program control of the turntable will be quite complicated, which is very likely to cause inaccurate template positioning and numerous faults, thus affecting the modeling efficiency and quality.

[0003] In order to avoid the shortcomings of the above-mentioned hydraulic turntable and improve the molding efficiency and quality, an electric four-station template conversion device was designed and manufactured as an alternative. The device uses a finished heavy-duty turntable as the driving and bearing equipment of the template turntable, and under the drive of a servo motor, it can achieve precise distribution and positioning of the template.

[0004] However, for electrically controlled heavy-duty transfer tables (such as cam roller turntables), on the one hand, a lot of sand particles fall on the turntable, especially when the sand particles enter the precise internal structure of the turntable, which makes cleaning more difficult and parts are easily damaged. On the other hand, the air in the working environment of the heavy-duty turntable contains more sand and dust particles. Even if the sand and dust particles do not fall onto the turntable, the sand and dust in the air will enter the turntable. Therefore, ordinary electrically controlled turntables are not capable of performing the corresponding work. Summary of the invention

[0005] The object of the present invention is to provide a template conversion device for a multi-station ductile iron pipe molding machine to solve the problem of sand particles easily entering the template transfer platform and causing damage as mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a template conversion device for a multi-station ductile iron pipe fitting molding machine, comprising a heavy-duty turntable, on which templates for casting molding of multiple stations are installed, the heavy-duty turntable comprises a turntable fixing seat and a turntable rotating surface that can rotate relative to the turntable, a seal is arranged between the two, a transition mounting plate is installed on the top of the turntable rotating surface, and a plurality of detachable template mounting frames are arranged on the top of the transition mounting plate, the outer end of the template mounting frame extends outward from the edge of the transition mounting plate, and the template is installed on the extension part of the template mounting frame.

[0007] Preferably, the lower surface of the rotating surface of the turntable and the upper surface of the turntable fixing seat are both provided with annular flanges, the two flanges are sleeved on each other, and the sealing member is nested between the fitting surfaces of the two flanges.

[0008] Preferably, the heavy-duty turntable is a cam roller turntable, and its power source is a servo motor. The PLC controls the servo motor in a manual mode or a full-automatic control mode.

[0009] Preferably, a number of support parts and limit parts are installed at the extended part of the template mounting frame. The support parts longitudinally restrain the template, and the limit parts transversely restrain the template.

[0010] Preferably, the support part is a template support block, and the limit part is a positioning hole. The template support block supports and levels the template, and the positioning part on the template is inserted into the positioning hole for transverse positioning.

[0011] Preferably, two expanded bifurcated parts are formed at the extended part of the template mounting frame. The template support blocks are fixedly installed on the bifurcated parts, and the positioning holes are opened on the bifurcated parts. Each template is arranged between two adjacent bifurcated parts of different template mounting frames.

[0012] Preferably, the number of template support blocks on each bifurcated part is two, and the number of positioning holes is one, and the positioning hole is located at the middle position between the two template support blocks.

[0013] Preferably, a guide sleeve is fixedly installed at the orifice of the positioning hole. The middle part of the guide sleeve is a guide hole communicating with the positioning hole, and the orifice of the guide hole is provided with an inverted arc angle.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The template mounting frame extends the template out from above the heavy-duty turntable, forming a physical isolation. During the modeling process, a large amount of sand grains are generated in the sand mold making. If these sand grains directly fall on the turntable, they may enter the precision components of the turntable, such as the contact part between the cam and the roller, the bearings of the turntable, etc. The mounting frame creates a certain space interval between the template and the turntable, and most of the sand grains will fall below the mounting frame or in the surrounding area under the action of gravity, rather than directly on the turntable, thus extending the service life of the turntable.

[0016] 2. In the modeling workshop, even if the turntable temporarily stops working, the sand grains generated during the surrounding modeling process may be suspended in the air. The sealing structure can ensure the cleanliness inside the turntable in this static situation.

[0017] 3. The mounting frame increases the template spacing, providing a more spacious operating space for maintenance personnel. The larger space allows people to use tools more conveniently, such as wrenches, screwdrivers, etc., without being restricted by a narrow space.

[0018] 4. The mounting rack is like a "carrying tool" that can stably carry the template. For a molding machine, the process of feeding the template requires precision and stability. The mounting rack has a structure adapted to the shape and size of the template, which can closely fit the template to prevent it from shaking or displacing during transportation, and the template is convenient to install and demold relative to the mounting rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a side view of the whole of the present invention;

[0020] Figure 2 is a schematic structural diagram of the template mounting rack in the present invention;

[0021] Figure 3 is a schematic structural diagram of the template support block in the present invention;

[0022] Figure 4 is a schematic structural diagram of the guide sleeve in the present invention;

[0023] Figure 5 is a schematic structural diagram of the transition mounting plate in the present invention;

[0024] Figure 6 is a schematic structural diagram of the heavy turntable in the present invention;

[0025] Figure 7 is a schematic structural diagram of the seal mounting structure in the present invention.

[0026] In the figures: 1. Heavy turntable; 2. Template; 3. Template mounting rack; 4. Template support block; 5. Transition mounting plate; 6. Guide sleeve; 7. Positioning hole; 8. Support block mounting hole; 9. Turntable fixing seat; 10. Turntable rotating surface; 11. Seal; 12. Forked part; 13. Flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1-2, four template mounting brackets 3 are installed on the transition mounting plate 5 at intervals of 90°, forming four template stations; the transition mounting plate 5 is fixed through the reserved threaded holes of the upper turntable fixing seat 9 on the heavy turntable 1. The outer end of the template mounting bracket 3 extends out of the transition mounting plate 5, and the outer end of the template mounting bracket 3 is bifurcated, which can form a Y shape, a T shape or other shapes. Installing the template 2 on the outer bifurcations can increase the installation space of the template 2, facilitate maintenance and replacement, and bring convenience to the staff. At the same time, the template mounting bracket 3 moves the template 2 away from above the heavy turntable 1, which can prevent most of the sand grains from falling on the area below or around the mounting bracket under the action of gravity, rather than directly falling on the turntable. For example, during the operation of a vertical parting flaskless shooting molding machine, when the sand mold is formed on the template, there will be excess sand grains scattered. Since the template extends out through the mounting bracket, the turntable is like in a "safe zone", effectively reducing the possibility of sand grains splashing directly.

[0029] Please refer to Figure 2-3 , the template support blocks 4 are installed on the bifurcations on both sides of the template mounting bracket 3 to adjust the level of the template 2. Two template support blocks 4 are set on a single bifurcation. Between the two template support blocks 4 is a guide sleeve 6 for positioning the template 2. The guide sleeve 6 is also installed on the bifurcation. The middle part of the guide sleeve 6 is a guide hole, and the top of the guide hole is provided with an inverted arc angle, which is convenient for the positioning part on the template 2 to be inserted into it for positioning. The template support block 4 is L-shaped, and the top of the template support block 4 is smooth, which is used for supporting and horizontally limiting the template 2. The middle part of the template support block 4 is screwed with mounting screws, and the mounting screws are screwed into the support block mounting holes 8 provided on the bifurcation. There are also positioning holes 7 on the bifurcation. The positioning holes 7 and the guide holes in the guide sleeve 6 are coaxially arranged, and the orifice of the guide hole is provided with a rounded corner, which is to facilitate the insertion of the positioning part on the template 2 for positioning. In short, the guide sleeve 6 is for facilitating the installation and demoulding of the template 2.

[0030] Please refer to Figure 6 , the heavy turntable 1 includes a turntable fixing seat 9 and a relatively rotating turntable rotating surface 10. The heavy turntable 1 is a cam roller turntable, and its power source is a servo motor. The PLC controls the servo motor in a manual mode or a full-automatic control mode, and a manual / auto conversion switch is installed on the PLC control cabinet or related equipment. When the conversion switch is turned to the "manual" position, the PLC enters the manual mode, and at this time, the operator can manually operate the equipment through buttons, knobs, etc.; when turned to the "auto" position, the PLC switches to the automatic mode and runs automatically according to the preset program. For example, on the MCC cabinet controlled by the motor, the manual and automatic switching is often realized through a remote / local conversion switch. When turned to local, it is manual operation, and when turned to remote, it is for the automatic control of the PLC. The entire conversion of the template 2 can be manually and automatically controlled, and according to the requirements of different production products, the free conversion of two templates 2 can be realized, and the upper and lower molds of two templates 2 are respectively installed at the four stations.

[0031] According to different production varieties, the two sets of templates 2 at the 4 workstations are converted under the control of the PLC, reducing the die change time. In addition, the servo motor drives the heavy turntable 1 to accurately index, accurately converting the template 2 to the mold clamping station, and during the mold clamping process, the entire turntable maintains stable positioning.

[0032] In addition, as Figure 7 shown, annular flanges 13 are provided on the lower surface of the rotating surface 10 of the turntable and the upper surface of the turntable fixing base 9. The diameters of the two flanges 13 are different and the two flanges 13 are sleeved with each other. The seal 11 is nested between the mating surfaces of the two flanges 13. Of course, as Figure 7 shown in the installation method of the seal 11, dust particles will not accumulate above the seal 11, and can further effectively achieve the sealing effect. Among them, the seal 11 can be a rubber ring, and the rubber ring is nested in a groove provided on one of the flanges 13. This design is to prevent sand and dust from entering the cam rollers inside the turntable from below the rotating surface 10 of the turntable, causing wear and even damage to the cam rollers. There must be a gap between the turntable and the base of the cam roller turntable to prevent wear when the turntable rotates. And as Figure 7 shown, the gap is provided between the bottom of the turntable and the base, so the above-mentioned sealing method is adopted.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A template conversion device for a multi-station ductile iron pipe molding machine, comprising a heavy-duty turntable (1), on which are mounted templates (2) for casting molding at multiple stations, characterized in that: The heavy-duty turntable (1) comprises a turntable fixing seat (9) and a turntable rotating surface (10) which can rotate relative to the turntable fixing seat, a sealing member (11) for preventing sand particles from entering the interior is arranged between the two, a transition mounting plate (5) is installed on the top of the turntable rotating surface (10), a plurality of detachable template mounting frames (3) are arranged on the top of the transition mounting plate (5), the outer ends of the template mounting frames (3) extend outward from the edge of the transition mounting plate (5), and the template (2) is installed on the extended portion of the template mounting frame (3).

2. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 1 is characterized in that: The lower surface of the turntable rotating surface (10) and the upper surface of the turntable fixing seat (9) are both provided with an annular flange (13), the two flanges (13) are sleeved on each other, and the sealing member (11) is nested between the contact surfaces of the two flanges (13).

3. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 2 is characterized in that: The heavy-duty turntable (1) is a cam roller turntable, whose power source is a servo motor. The PLC controls the servo motor in a manual mode or a fully automatic control mode.

4. The template conversion device for a multi-station ductile iron pipe molding machine according to any one of claims 1 to 3, characterized in that: A plurality of supporting parts and limiting parts are installed at the extended portion of the template installation frame (3), the supporting parts longitudinally constrain the template (2), and the limiting parts transversely constrain the template (2).

5. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 4 is characterized in that: The supporting portion is a template support block (4), and the limiting portion is a positioning hole (7). The template support block (4) supports and levels the template (2), and the positioning portion on the template (2) is inserted into the positioning hole (7) to perform lateral positioning.

6. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 5 is characterized in that: An extended portion of the template mounting frame (3) is formed with two unfolded forked portions (12), the template support block (4) is fixedly mounted on the forked portion (12), a positioning hole (7) is provided on the forked portion (12), and each template (2) is arranged between two adjacent forked portions (12) of different template mounting frames (3).

7. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 6 is characterized in that: The number of template support blocks (4) on each fork portion (12) is two, the number of positioning holes (7) is one, and the positioning hole (7) is located in the middle of the two template support blocks (4).

8. The template conversion device for a multi-station ductile iron pipe molding machine according to claim 7 is characterized in that: A guide sleeve (6) is fixedly mounted on the opening of the positioning hole (7); the middle portion of the guide sleeve (6) is a guide hole connected to the positioning hole (7); and a chamfered arc angle is provided at the opening of the guide hole.

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