CN110884019A - Centrifugal device for producing tire by using polyurethane elastomer mold - Google Patents

Abstract

The invention discloses a centrifugal device for producing a tire by a polyurethane elastomer mold, which comprises a polyurethane elastomer mold and a power device for driving the mold to rotate, wherein the power device comprises a rotating part for placing the mold and enabling the mold to rotate through static friction and a pressing part which is arranged right above the rotating part, moves towards the rotating part, is matched with the rotating part to clamp the mold and rotates along with the mold, the rotating axes of the rotating part, the mold and the pressing part are collinear, the mold comprises an upper mold and a lower mold, a feeding hole which is used for feeding polyurethane foaming slurry and is collinear with the rotating axis of the mold is arranged at the top of the upper mold, and a filling hole which is coaxial with the rotating axis is arranged on the pressing part. The invention greatly reduces the cost and improves the production efficiency.

Description

Centrifugal unit for the production of tires from polyurethane elastomer moulds

technical field

The invention belongs to the technical field of tire production, and particularly relates to a centrifugal device used for producing tires with a polyurethane elastomer mold.

Background technique

Polyurethane is a general term for macromolecular compounds containing repeating urethane groups on the main chain. With the continuous development of the polyurethane industry, the application range of polyurethane is also becoming wider and wider, which can replace rubber, plastic, nylon, etc., used in airports, hotels, building materials, automobile factories, coal mines, cement factories, senior apartments, villas, gardens Landscaping, colored stone art, parks, etc.

In the tire production industry, polyurethane foam materials are also used to produce tires. The traditional tire foaming process is carried out in metal molds. The metal molds are fixed on the worktable, and the centrifugal force is generated by the rotation of the motor at the bottom to disperse the mold. Polyurethane foam material inside. However, the use of metal molds has the following problems: (1) the high cost of metal raw materials and the complex casting production process lead to high manufacturing costs of metal molds; (2) the high density of metal molds leads to excessive weight of a single metal mold, so the tire production process Usually, metal molds can only be fixed and use fixed driving equipment, which on the one hand will increase the equipment investment cost of enterprises, and fixed metal molds are not convenient for demoulding of tires after molding.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the above-mentioned prior art, the present invention provides a centrifugal device for producing tires from a polyurethane elastomer mold.

The present invention realizes and solves the above-mentioned technical problems through the following technical means:

A centrifugal device for producing tires from a polyurethane elastomer mold, comprising a polyurethane elastomer mold and a power device for driving the mold to rotate, the power device comprising a rotating part for placing the mold and rotating the mold through static friction; Just above the pressing part that clamps the mold and rotates with the rotating part by moving toward the rotating part, the rotation axes of the rotating part, the mold and the pressing part are collinear, and the mold includes an upper mold and a lower mold. A mold, the top of the upper mold is provided with a feeding hole for feeding the polyurethane foam slurry and is collinear with the rotation axis of the mold, and the pressing part is provided with a filling hole coaxial with the rotation axis. .

Further, the pressing part includes a pressure plate and a control frame, the filling hole is arranged in the center of the pressure plate, the control frame penetrates up and down for installing the pressure plate, and the pressure plate is rotatably connected with the control frame.

Further, the rotating part includes a base placed on a level ground, a motor fixedly installed in the base, and a turntable rotatably arranged on the top of the base and drivingly connected with the output shaft of the motor.

Further, the center of the top surface of the turntable is provided with a convex block, and the bottom of the lower mold is provided with a groove adapted to the convex block.

Further, the bump is in the shape of a pie.

The beneficial effects of the present invention are as follows: (1) the present invention adopts the polyurethane elastomer raw material as the mold, so that the production of the mold becomes cheaper and more convenient, and greatly reduces the production cost of the mold; (2) the present invention adopts the polyurethane elastomer raw material as the mold. The mold can be easily taken out, which solves the problem of high equipment investment cost caused by the fixed combination of the mold and the driving equipment, and also reduces the idle period of the centrifugal device when the tire is demolded, which is conducive to improving production efficiency.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the centrifugal device of the present invention;

2 is a schematic structural diagram of a pressing portion of the present invention;

FIG. 3 is a schematic view of the structure of the rotating part of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, 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 These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

As shown in FIG. 1 , a centrifugal device for producing a tire from a polyurethane elastomer mold includes a polyurethane elastomer mold 10 and a power device for driving the mold 10 to rotate. The power device includes placing the mold 10 and rotating the mold 10 through static friction. The rotating part 21 and the pressing part 22 arranged directly above the rotating part 21, which cooperate with the rotating part 21 to clamp the mold 10 and rotate with the mold 10 by moving toward the rotating part 21. The rotating part 21, the mold 10 and the pressing part 22 The rotation axis of the part 22 is collinear, the mold 10 includes an upper mold 11 and a lower mold 12, and the top of the upper mold 11 is provided with a feeder for feeding the polyurethane foam slurry and colinear with the rotation axis of the mold 10. The material hole 111 is provided on the pressing portion 22 with a material filling hole 221 coaxial with the rotation axis.

The traditional centrifugal device used in the production of polyurethane foam tires needs to fix the metal mold on the bottom rotating disk, so the mold is inconvenient to disassemble when demoulding, which leads to the problem of inconvenience in tire demolding. The present invention adopts the raw material of polyurethane elastomer as the mold 10, which has the characteristics of light weight, fixed shape and reduced property, and is very suitable as a mold, and the performance of the upper mold 11 and the lower mold 12 made of the raw material of the polyurethane elastomer is similar to that of rubber. Similarly, there is no need to add additional sealant pads to ensure the sealing performance when the mold is closed; the production of the mold 10 has also become cheaper and more convenient. In the early stage, it is only necessary to entrust a company to produce a set of metal mold matrix, and the tire manufacturing company can The mold 10 for producing tires is manufactured directly by using its own polyurethane elastomer raw material with the mold mother, which greatly reduces the production cost of the mold. In the production process, the upper mold 11 and the lower mold 12 are directly placed on the surface of the rotating part 21, and then the pressing part 22 is controlled to move downward to press the mold 10 on the surface of the rotating part 21 to improve the relationship between the mold 10 and the rotating part 21 by clamping. The friction between the rotating parts 21, after controlling the rotating part 21 to rotate, the mold 10 is driven by the rotating part 21 to rotate together under the action of static friction. When the mold 10 rotates, the rotation of the mold 10 is affected. While the mold 10 is rotating, the polyurethane foam slurry is poured into the cavity of the mold 10 through the filling hole 221 and the feeding hole 111 in turn, and it can be formed after centrifugation for 5 minutes. Tire, stop the rotating part 21 and lift the pressing part 22, the mold 10 can be easily taken out, and the next closed mold 10 can be directly placed on the rotating part 21 for the production of the next tire, which reduces the tire demoulding. The idle period of the centrifugal device is beneficial to improve the production efficiency. Moreover, since the mold 10 and the rotating part 21 are only in surface contact, and the rotating energy is transmitted to the mold 10 by cooperating with the pressing part 22, there are no mechanical connecting parts, so a lot of time can be saved when the mold 10 is removed. , greatly improving production efficiency.

It should be noted that although both the mold 10 and the tire are made of polyurethane, the mold 10 is made of polyurethane, which needs to be heated and cured. The tire is mainly made of polyurethane, which is mixed with other additives such as foaming agents, and can be cured and formed after a short centrifugation. The obtained tire has a small density but has a certain elasticity, so it is more suitable for To manufacture tires; moreover, the mold 10 needs to paint a layer of liquid release agent on the inner surface of the cavity between mold clamping, so as to facilitate the mold release work after the tire is formed.

As shown in FIGS. 1 and 2 , the pressing part 22 includes a pressure plate 224 and a control frame 222 , the filling hole 221 is arranged in the center of the pressure plate 224 , and the control frame 222 penetrates up and down for installing the pressure plate 224 . The pressure plate 224 is rotatably connected to the control frame 222 . Specifically, the pressure plate 224 and the control frame 222 can be rotated relative to each other through the bearing 223, so that the pressure plate 224 can independently rotate with the mold 10 after pressing the mold 10, and the control frame 222 is used to drive the pressure plate 224 to move up and down , the up and down movement of the control frame 222 can be realized by a hydraulic cylinder or a pneumatic cylinder (not shown in the figure), and only the control frame 222 needs to be fixedly connected to the end of the telescopic column of the hydraulic cylinder by welding or bolts.

As shown in FIGS. 1 and 3 , the rotating part 21 includes a base 211 placed on a level ground, a motor 212 fixedly installed in the base 211 , and a turntable 213 rotatably arranged on the top of the base 211 and connected to the output shaft of the motor 212 . The motor 212 is used to provide power to drive the turntable 213 to rotate, and the gear mesh 215 is used for transmission between the motor 212 and the turntable 213. Since the motor 212 needs to be powered on, it is easy to control the start and stop of the motor 212 to control the rotation of the turntable 213, which is convenient for control The mold 10 is attached and detached. In addition, in order to facilitate the control of the rotational speed of the mold 10, a reducer may be installed at the output end of the motor 212, and the rotational connection between the turntable 213 and the base 211 may also be realized by bearings.

The centrifugal device also includes a PLC control system, which is electrically connected to the motor 212, and is also electrically connected to the solenoid valve of the hydraulic cylinder, so as to ensure the controllability and consistency of the up and down movement of the control frame 222, and avoid manual operation. deviation problem.

As shown in FIG. 3 , the center of the top surface of the turntable 213 is provided with a bump 214 , and the bottom of the lower mold 12 is provided with a groove (not shown in the figure) adapted to the bump 214 , which is convenient for placing the mold Position the mold 10 at 10 o'clock to ensure that the rotation axes of the mold 10, the turntable 213 and the pressure plate 224 are collinear, so as to ensure that the feeding hole 111 and the filling hole 221 are aligned and not deflected when the mold 10 rotates, which is convenient for filling.

The bumps 214 are round cakes (not shown in the figure), so that the edges of the bumps 214 and the grooves do not need to be aligned when placing the mold 10 , which improves the placement efficiency of the mold 10 and thus improves the work efficiency.

It should be noted that, in this document, if there are relational terms such as first and second, etc., it is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply these entities or operations There is no such actual relationship or order between them. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. The centrifugal device for producing the tire by using the polyurethane elastomer mold is characterized by comprising the polyurethane elastomer mold (10) and a power device for driving the mold (10) to rotate, the power device comprises a rotating part (21) for placing the die (10) and enabling the die (10) to rotate through static friction, and a pressing part (22) which is arranged right above the rotating part (21) and clamps the die (10) through moving towards the rotating part (21) and matching with the rotating part (21) and rotates along with the die (10), the rotating axes of the rotating part (21), the mould (10) and the pressing part (22) are collinear, the mould (10) comprises an upper mould (11) and a lower mould (12), the top of the upper mould (11) is provided with a feeding hole (111) which is used for feeding polyurethane foaming slurry and is collinear with the rotation axis of the mould (10), and the pressing part (22) is provided with a material filling hole (221) which is coaxial with the rotation axis.

2. The centrifugal device for producing the tire by using the polyurethane elastomer mold as claimed in claim 1, wherein the pressing part (22) comprises a pressing plate (224) and a control frame (222), the material pouring hole (221) is arranged in the center of the pressing plate (224), the control frame (222) is vertically penetrated for installing the pressing plate (224), and the pressing plate (224) is rotatably connected with the control frame (222).

3. The centrifuge device for producing tire with polyurethane elastomer mold as claimed in claim 1 or 2, wherein said rotating part (21) comprises a base (211) placed on a horizontal ground, a motor (212) fixedly installed in the base (211), and a turntable (213) rotatably installed on top of the base (211) and in transmission connection with the output shaft of the motor (212).

4. The centrifugal device for producing the tire by using the polyurethane elastomer mold as claimed in claim 3, wherein the center of the top surface of the turntable (213) is provided with a bump (214), and the bottom of the lower mold (12) is provided with a groove matched with the bump (214).

5. The centrifuge device for polyurethane elastomer molds for producing tires according to claim 4, characterized in that the projections (214) are pie-shaped.

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