Mould opening jacking device for PU automatic forming production line

Abstract

The invention provides a PU automatic forming production line mold opening jacking device, and relates to the technical field of PU automatic forming devices, the PU automatic forming production line mold opening jacking device comprises a base, a lifting plate and a top plate, and the lifting plate performs lifting translation sliding between the base and the top plate; an upper mold is rotationally mounted on the top plate through a rotating shaft in a fixed shaft manner; a lower mold is mounted on the rotating base, and PU liquid added inside is promoted to be uniformly distributed through centrifugal force generated by synchronous fixed shaft rotating motion; the lifting isolating ring performs lifting motion under the work of the lifting driving mechanism, so that the upper mold and the lower mold have two working states of internal foaming forming and external foaming forming in sequence; the lower mold arranged in a targeted mode is adopted, the inherent cognition of the prior art is broken, one-time forming of the polyurethane foaming materials with different properties and characteristics is achieved, the process steps are greatly simplified, the bonding strength between the polyurethane materials with different properties is improved, and the method is suitable for being widely popularized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of PU automatic forming devices, in particular to a PU automatic forming production line mold opening and lifting device. BACKGROUND

[0002] The polyurethane foaming mold base cylinder lifting platform disclosed in the prior art with the publication number CN211105199U comprises a bottom mold, a top mold and a mold pressing platform for pushing the top mold, a bottom frame and a bearing table arranged at the bottom of the bottom mold, and a base is further arranged at the bottom of the bearing table. After pouring the polyurethane foaming material into the bottom mold, the mold pressing platform pushes the top mold and the bottom mold to complete the mold closing process, and the base is lifted up under the pushing of the cylinder, so that the bottom mold is lifted up through the bearing table, the gap between the bottom mold and the top mold is effectively reduced, the polyurethane foaming material can be uniformly distributed in the mold, and the hard pushing force is too large during the pushing process of the cylinder. Through the buffer assembly, the buffer performance of the fixed plate is effectively increased during the pushing process of the cylinder, so that the damage of the top mold and the bottom mold caused by the excessive pushing of the cylinder and the excessive pressure is avoided.

[0003] However, the above-mentioned device still has the following obvious defects in the use process: the above-mentioned device and the polyurethane forming mold in the prior art both adopt a one-time forming mold structure, that is, a cavity formed by combining the upper mold and the lower mold, and the foaming forming is completed by adding PU liquid into the cavity. This forming method can produce most of the polyurethane products with uniform structural properties, but in actual production, there are polyurethane foaming structures composed of different physical properties. For this mechanism, multiple mold closing and foaming are required, for example, in the production process of the polyurethane tire, the tire body on the inner side of the rim needs to have a large structural strength to improve the impact resistance of the tire, and the tire body on the outer side of the rim needs to have a large elasticity to improve the cushioning characteristics of the tire during road driving. The above-mentioned two different tire body structures need to use different raw materials and proportions, so they cannot be completed in one forming process. In summary, the polyurethane foaming forming structure in the prior art has the technical defects of complicated steps and loose structure combination for different proportions of raw materials. SUMMARY

[0004] The purpose of the present application is to provide a PU automatic forming production line mold opening and lifting device to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The utility model provides a kind of PU automatic forming production line opening mould jacking device, including base, lifting plate and top plate, the base is connected with top plate by four corners fixed installation slide rod, the lifting plate four corners are matched with four slide rods by the slide rod sleeve of installation, so that lifting plate is lifted between base and top plate and is translated sliding; The top plate is rotatably mounted with an upper mold through an axis; A rotating base coaxial with the upper mold is arranged in the rotating disc groove, and the rotating base is connected with the lifting plate through a rotating support. The lower mold includes an inner ring, a lifting isolation ring and an outer ring, the inner ring and the outer ring are fixedly connected with the rotating base through connecting columns, and the lifting isolation ring is arranged in the gap between the inner ring and the outer ring. In the inner foaming forming state, the lifting isolation ring rises in the upper mold and the lower mold, and the upper end surface of the lifting isolation ring abuts against the inner bottom surface of the upper mold. In the outer foaming forming state, the lifting isolation ring descends in the upper mold and the lower mold, and the upper end surface of the lifting isolation ring is flush with the upper end surface of the inner ring.

[0006] Preferably, a plurality of first jacking hydraulic cylinders are arranged between the base and the lifting plate, the telescopic arms of the first jacking hydraulic cylinders are fixedly connected with the lifting plate, and the lifting plate is translated and slid by the telescopic movement of the first jacking hydraulic cylinders.

[0007] Preferably, a plurality of second jacking hydraulic cylinders are fixedly installed on the rotating base, the telescopic arms of the second jacking hydraulic cylinders are fixedly connected with the bottom of the lifting isolation ring, and the lifting isolation ring is switched between working states by the telescopic movement of the second jacking hydraulic cylinders.

[0008] Preferably, sealing rings are arranged on the abutting end surfaces of the upper mold and the outer ring, the abutting end surfaces of the upper mold and the lifting isolation ring, and the abutting end surfaces of the lifting isolation ring and the inner ring and the outer ring, so as to ensure the sealing of the inner foaming cavity and the peripheral foaming cavity.

[0009] Preferably, a driving gear ring is fixedly installed on the outer edge of the rotating base, the driving gear ring is engaged with a driving gear fixedly installed on a driving shaft of a centrifugal motor, the centrifugal motor is fixedly installed on the lifting plate, and the upper mold and the lower mold are synchronously driven to perform centrifugal rotating movement through rotation of the centrifugal motor.

[0010] Preferably, a first feeding opening is formed in the axis of the upper mold and penetrates the rotating shaft and the top plate, and PU liquid is added into the inner foaming cavity through the first feeding opening.

[0011] Preferably, a second feeding opening is formed in the outer ring, and PU liquid is added into the peripheral foaming cavity through the second feeding opening.

[0012] Preferably, the first feeding opening and the second feeding opening are blocked by detachably arranged blocking blocks.

[0013] Preferably, an annular groove is formed in the lifting isolation ring on one side of the inner foaming cavity, the annular groove is isolated from the external environment through an expanded rubber film, an inlet and outlet hole is further formed in the lifting isolation ring on the inner side of the annular groove, the inlet and outlet hole is communicated with a bidirectional air pump fixedly installed on the rotating base through a pipeline, and the concave-convex form of the expanded rubber film is changed through inflation and deflation of the bidirectional air pump.

[0014] Compared with the prior art, the present application has the following beneficial effects: The present application adopts the specifically arranged lower mold, breaks the inherent cognition of the prior art, realizes one-time forming of polyurethane foaming materials with different properties and characteristics, greatly simplifies the process steps, and improves the bonding strength between polyurethane materials with different properties, and is suitable for wide promotion. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure perspective view of the present application; Figure 2 It is a whole structure sectional view of the present application; Figure 3 It is a whole structure front view of the present application; Figure 4 It is a sectional view of the upper mold and the lower mold of the present application; Figure 5 It is a schematic view of two working modes of inner foaming forming and outer foaming forming of the present application; Figure 6 It is a schematic view of concave-convex form change of the expanded rubber film of the present application.

[0016] In the figure: 1 base, 2 lifting plate, 3 top plate, 4 slide rod, 5 slide rod sleeve, 6 rotating shaft, 7 upper mold, 8 rotary support, 9 inner ring, 10 lifting isolation ring, 11 outer ring, 12 inner foaming cavity, 13 peripheral foaming cavity, 14 first jacking hydraulic cylinder, 15 second jacking hydraulic cylinder, 16 driving gear ring, 17 first feeding port, 18 second feeding port, 19 annular groove, 20 expanded rubber membrane, 21 air inlet and outlet hole, 22 connecting column, 23 rotary base. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Please refer to Figures 1-6 The present application provides a technical solution: Embodiment one:

[0019] A PU automatic forming production line mold opening jacking device, including base 1, lifting plate 2 and top plate 3, base 1 and top plate 3 are connected through four corner fixed installation slide rod 4, lifting plate 2 four corners through the installation of slide rod sleeve 5 and four slide rods 4 corresponding cooperation, so that the lifting plate 2 between the base 1 and the top plate 3 lifting translation sliding; The top plate 3 is rotatably mounted with the upper mold 7 through the rotating shaft 6; The lifting plate 2 is provided with a rotating disc groove, and the rotating disc groove is provided with a rotary base 23 coaxial with the upper mold 7, the rotary base 23 is connected with the lifting plate 2 through the rotary support 8, and the lower mold is installed on the rotary base 23, the lower mold is matched with the upper mold 7 in the lifting process of the lifting plate 2, and the centrifugal force generated by synchronous fixed shaft rotation is used to promote the uniform distribution of the PU liquid added inside; The lower mold includes an inner ring 9, a lifting isolation ring 10 and an outer ring 11, the inner ring 9 and the outer ring 11 are fixedly connected with the rotary base 23 through the connecting column 22, the lifting isolation ring 10 is liftingly arranged at the gap formed by the inner ring 9 and the outer ring 11, and the lifting isolation ring 10 performs lifting movement under the action of the lifting driving mechanism, so that the upper mold 7 and the lower mold have two working states of inner foaming forming and outer foaming forming in sequence; wherein, In the inner foaming forming working state, the lifting isolation ring 10 rises in the upper mold 7 and the lower mold, the upper end surface of the lifting isolation ring 10 abuts against the inner bottom surface of the upper mold 7, at this time, the upper mold 7, the lifting isolation ring 10 and the inner ring 9 form an inner foaming cavity 12, and the foaming inner ring is formed by adding PU into the inner foaming cavity 12; In the outer foaming forming working state, the lifting isolation ring 10 is lowered in the upper die 7 and the lower die, the upper end surface of the lifting isolation ring 10 is flush with the upper end surface of the inner ring 9, at this time, the foamed inner ring, the upper die 7, the lifting isolation ring 10, the inner ring 9 and the outer ring 11 jointly enclose the peripheral foaming cavity 13, and the PU is added into the peripheral foaming cavity 13 to form the foamed outer ring.

[0020] In this embodiment, the base 1, the top plate 3 and the slide rod 4 constitute the main frame structure of the device, and the lifting plate 2 is installed through the slide rod 4, the lifting plate 2 slides along the length direction of the slide rod 4, the upper die 7 is rotationally installed at the bottom of the top plate 3, the lower die is installed on the lifting plate 2 through the rotary support 8, and the mold is closed through the cooperation of the upper die 7 and the lower die, wherein, different from the prior art, the lower die includes the inner ring 9, the lifting isolation ring 10 and the outer ring 11, the inner ring 9 and the outer ring 11 are fixedly connected with the rotary base 23 through the connecting column 22, and the lifting isolation ring 10 is arranged in the gap between the inner ring 9 and the outer ring 11, when the upper end surface of the lifting isolation ring 10 abuts against the inner bottom surface of the upper die 7, the upper die 7, the lifting isolation ring 10 and the inner ring 9 enclose the inner foaming cavity 12, at this time, the PU is added into the inner foaming cavity 12 to form the foamed inner ring, after the foamed inner ring is formed, the demolding operation is not needed, the lifting isolation ring 10 is driven to be lowered, so that the upper end surface of the lifting isolation ring 10 is flush with the upper end surface of the inner ring 9, at this time, the foamed inner ring, the upper die 7, the lifting isolation ring 10, the inner ring 9 and the outer ring 11 jointly enclose the peripheral foaming cavity 13, and the PU is added into the peripheral foaming cavity 13 again to form the foamed outer ring, through the above-mentioned manner, the forming of the inner and outer two different property polyurethane foaming materials can be carried out without demolding, compared with the separate forming and manual assembly manner in the prior art, the production process can be simplified, and the PU material added peripherally can tightly adhere to the foamed inner ring in the foaming process, further through increasing the roughness and the concave-convex form of the foamed inner ring, the polyurethane material with more closely combined can be produced, and the combined manner in the forming process is more closely combined than the assembly manner after separate forming. Embodiment two:

[0021] A plurality of first lifting hydraulic cylinders 14 are arranged between the base 1 and the lifting plate 2, the telescopic arms of the first lifting hydraulic cylinders 14 are fixedly connected with the lifting plate 2, and the first lifting hydraulic cylinders 14 drive the lifting plate 2 to slide through the telescopic movement.

[0022] A plurality of second hydraulic jacks 15 are fixedly installed on the rotating base 23, the telescopic arms of the second hydraulic jacks 15 are fixedly connected to the bottom of the lifting isolation ring 10, and the lifting isolation ring 10 is switched between working states through the telescopic movement of the second hydraulic jacks 15.

[0023] In this embodiment, the driving mechanism for driving the lifting plate 2 and the lifting isolation ring 10 to perform lifting movement is disclosed, both of which adopt the hydraulic telescopic cylinder type jacking scheme. This device has the characteristics of large jacking pressure. Considering that the electric hydraulic cylinder type telescopic scheme is relatively common in the prior art, it will not be described here. Embodiment three:

[0024] Sealing rings are arranged on the abutting end faces of the upper mold 7 and the outer ring 11, the abutting end faces of the upper mold 7 and the lifting isolation ring 10, and the abutting end faces of the lifting isolation ring 10 and the inner ring 9 and the outer ring 11. The sealing property of the inner foaming cavity 12 and the peripheral foaming cavity 13 is ensured through the arrangement of the sealing rings.

[0025] In this embodiment, considering that the sealing property between the upper mold 7 and the lower mold needs to be ensured during the molding process of the polyurethane foaming material, sealing rings are arranged in the areas that need to be sealed, thereby improving the air tightness of the device and effectively preventing the foaming material from leaking during the molding process. Embodiment four:

[0026] A driving gear ring 16 is also fixedly installed on the outer edge of the rotating base 23, the driving gear ring 16 is engaged with the driving gear fixedly installed on the driving shaft of the centrifugal motor, and the centrifugal motor is fixedly installed on the lifting plate 2. The upper mold 7 and the lower mold are synchronously driven to perform centrifugal rotation movement through the rotation of the centrifugal motor.

[0027] In this embodiment, the technical scheme of rotating the rotating base 23 through the motor is disclosed. This driving mechanism is relatively common in real life. In order to ensure the uniformity of foaming and molding of each part after the upper mold 7 and the lower mold are matched, the lower mold is driven to rotate through the rotating base 23, and the upper mold 7 abuttingly matched with the lower mold is synchronously driven to perform rotation movement, thereby promoting the uniform distribution of the PU material added inside and ensuring the uniformity of subsequent foaming and molding. Embodiment five:

[0028] A first feeding port 17 is also arranged at the axis of the upper mold 7 and penetrates the rotating shaft 6 and the top plate 3, and PU liquid is added into the inner foaming cavity 12 through the first feeding port 17.

[0029] A second feeding port 18 is also arranged on the outer ring 11, and PU liquid is added into the peripheral foaming cavity 13 through the second feeding port 18.

[0030] The first feeding port 17 and the second feeding port 18 are both closed by a detachable closing block.

[0031] In this embodiment, the PU material is added through the first feeding port 17 and the second feeding port 18 respectively, and is closed by the closing block after the addition is completed, so as to ensure the air tightness inside. Since the closing mode by the closing block is common in the field, it is not shown in detail in the drawings, and the closing block can be closed by the opening or by the electric mechanical structure connected therewith, which are all within the scope of use in this embodiment. Embodiment six:

[0032] The lifting isolation ring 10 is provided with an annular groove 19 on one side of the inner foaming cavity 12, the annular groove 19 is isolated from the external environment by an inflatable rubber film 20, and the lifting isolation ring 10 on the inner side of the annular groove 19 is further provided with an air inlet and outlet hole 21, which is communicated with a bidirectional air pump fixedly installed on a rotating base 23 through a pipeline, and the inflatable rubber film 20 changes the concave-convex shape by the inflation and deflation of the bidirectional air pump.

[0033] In this embodiment, the annular groove 19 is further provided on the inner side of the lifting isolation ring 10, and the annular groove 19 is closed by the inflatable rubber film 20, which is not described in detail in the drawings with reference to the description of the inflatable rubber film 20. Figure 6 When the air is extracted from the annular groove 19 through the air inlet and outlet hole 21, the inflatable rubber film 20 presents a concave shape in the middle and upper side. Figure 6 Similarly, when the air is filled into the annular groove 19 through the air inlet and outlet hole 21, the inflatable rubber film 20 presents a convex shape in the middle and lower side. Figure 6 The significance of this design is that, in the foaming and forming process of the inner foaming ring, the inflatable rubber film 20 is convex when the air is filled into the air inlet and outlet hole 21, and correspondingly, the convex inflatable rubber film 20 will extrude the space of the PU foaming and forming, so as to make the outer edge of the formed inner foaming ring form a concave shape. When the inner foaming ring is formed, the air is extracted from the annular groove 19 through the air inlet and outlet hole 21, and at this time, the inflatable rubber film 20 changes from the convex shape to the concave shape. In this process, the inflatable rubber film 20 is separated from the abutting surface of the inner foaming ring, so as to reduce the friction in the lowering process of the lifting isolation ring 10, which is more conducive to the transformation into the outer foaming forming working state. In addition, the concave shape formed on the outer edge of the inner foaming ring can form a concave-convex surface combination with the outer foaming ring in the outer foaming forming process, so as to make the combination of the inner foaming ring and the outer foaming ring more compact. The inflatable rubber film 20 changes the shape in the working process of the bidirectional air pump, and the bidirectional air pump is fixedly installed on the rotating base 23, so as to realize the inflation and deflation operation. Since this inflation and deflation mechanism is common in the prior art, it will not be described here.

[0034] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A PU automatic forming production line mold opening lifting device, comprising a base, a lifting plate and a top plate, the base and the top plate are connected by four corner fixed installation slide rods, the lifting plate four corners are matched with four slide rods through the installation of slide rod sleeve, so that the lifting plate is lifted and translated between the base and the top plate; characterized in that: the top plate is rotatably mounted with an upper mold through a rotating shaft; a rotating disc groove is formed on the lifting plate, a rotating base coaxial with the upper mold is arranged in the rotating disc groove, the rotating base is connected with the lifting plate through a rotating support, a lower mold is installed on the rotating base, the lower mold is matched with the upper mold during the lifting of the lifting plate, and the centrifugal force generated by the synchronous fixed shaft rotation promotes the uniform distribution of the PU liquid added inside; the lower mold comprises an inner ring, a lifting isolation ring and an outer ring, the inner ring and the outer ring are fixedly connected with the rotating base through connecting columns, the lifting isolation ring is arranged in the gap between the inner ring and the outer ring, and the lifting isolation ring is lifted and moved under the action of the lifting driving mechanism, so that the upper mold and the lower mold have two working states of inner foaming forming and outer foaming forming in sequence; wherein, in the inner foaming forming working state, the lifting isolation ring rises in the upper mold and the lower mold, the upper end surface of the lifting isolation ring abuts against the inner bottom surface of the upper mold, at this time, the upper mold, the lifting isolation ring and the inner ring form an inner foaming cavity, and the foaming inner ring is formed by adding PU into the inner foaming cavity; in the outer foaming forming working state, the lifting isolation ring descends in the upper mold and the lower mold, the upper end surface of the lifting isolation ring is arranged in a flush manner with the upper end surface of the inner ring, at this time, the foaming inner ring, the upper mold, the lifting isolation ring, the inner ring and the outer ring together form an outer peripheral foaming cavity, and the foaming outer ring is formed by adding PU into the outer peripheral foaming cavity.

2. The PU automatic forming production line mold opening and lifting device according to claim 1, characterized in that: a plurality of first lifting hydraulic cylinders are arranged between the base and the lifting plate, the telescopic arms of the first lifting hydraulic cylinders are fixedly connected with the lifting plate, and the lifting plate is driven to slide by the telescopic movement of the first lifting hydraulic cylinders.

3. The PU automatic forming production line mold opening and lifting device according to claim 1 or 2, characterized in that: a plurality of second lifting hydraulic cylinders are fixedly installed on the rotating base, the telescopic arms of the second lifting hydraulic cylinders are fixedly connected with the bottom of the lifting isolation ring, and the lifting isolation ring is driven to switch the working state by the telescopic movement of the second lifting hydraulic cylinders.

4. The PU automatic forming production line mold opening and lifting device according to claim 3, characterized in that: sealing rings are arranged on the abutting end surfaces of the upper mold and the outer ring, the abutting end surfaces of the upper mold and the lifting isolation ring, and the abutting end surfaces of the lifting isolation ring and the inner ring and the outer ring, and the sealing performance of the inner foaming cavity and the outer peripheral foaming cavity is ensured by the sealing rings.

5. The PU automatic forming production line mold opening and lifting device according to claim 4, characterized in that: a driving gear ring is fixedly installed on the outer edge of the rotating base, the driving gear ring is engaged with the driving gear fixedly installed on the centrifugal motor driving shaft, the centrifugal motor is fixedly installed on the lifting plate, and the upper mold and the lower mold are synchronously driven to rotate by the rotation of the centrifugal motor.

6. The PU automatic forming production line mold opening and lifting device according to claim 5, characterized in that: a first feeding port penetrating the rotating shaft and the top plate is formed on the axis of the upper mold, and PU liquid is added into the inner foaming cavity through the first feeding port.

7. The PU automatic forming production line mold opening and lifting device according to claim 6, characterized in that: The outer ring is also provided with a second feeding opening, through which PU liquid is added into the peripheral foaming cavity.

8. The PU automatic forming production line mold opening and lifting device according to claim 7, characterized in that: The first feeding opening and the second feeding opening are both closed by detachably arranged blocking blocks.

9. The PU automatic forming production line mold opening and lifting device according to claim 8, characterized in that: The lifting isolation ring is provided with an annular groove on one side of the inner foaming cavity, the annular groove is isolated from the external environment by an inflatable rubber film, and the lifting isolation ring on the inner side of the annular groove is also provided with an air inlet and outlet hole, the air inlet and outlet hole is communicated with a bidirectional air pump fixedly installed on the rotating base through a pipeline, and the concave-convex shape of the inflatable rubber film is changed by inflation and deflation of the bidirectional air pump.

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