Rotary supporting arm of rotational molding machine

Abstract

The utility model discloses a rotary support arm of a rotational moulding machine, which belongs to the technical field of rotational moulding and comprises a support arm body, an upper mould tray, a lower mould tray, a driving mechanism and a power supply slip ring structure. The upper mold tray and the lower mold tray are installed on the two faces of the supporting arm body respectively, the upper mold and the lower mold are clamped on the upper mold tray and the lower mold tray respectively, and the power supply sliding ring structure is used for supplying power to the upper mold and the lower mold. According to the utility model, the problem of low rotational molding processing efficiency of a single-sided mold is solved, and the problem of mold heating power supply during synchronous processing of a double-sided mold is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of rotational moulding, especially to a rotating support arm of a rotational moulding machine. BACKGROUND

[0002] Rotational moulding, also known as rotomolding, spin molding, or rotational casting, is a method of manufacturing hollow plastic parts. The process involves placing plastic powder into a mold, which is then heated while being rotated on two perpendicular axes. The plastic powder melts and adheres to the inner surface of the mold, forming a hollow part. The mold is then cooled, and the part is removed.

[0003] Currently, the mold support of the rotational molding machine on the market is usually supported by an L-shaped support arm. For example, patent No. 202322905621.1 discloses an L-arm electric heating rotational molding machine, which includes a base, a low-voltage electrical box, a high-voltage electrical box, a mounting frame, a first driving mechanism, a rotating support arm, a second driving mechanism, a chucking disc, an aviation plug, a cooling mechanism, a main shaft conductive slip ring, and a secondary shaft conductive slip ring. The low-voltage electrical box, the mounting frame, and the high-voltage electrical box are sequentially arranged on the top of the base. The rotating support arm is arranged in an L shape, and the chucking disc is arranged on the rotating support arm. The rotating directions of the chucking disc and the rotating support arm are perpendicular to each other. The mold is fixed by the chucking disc, and the aviation plug is fixed on the chucking disc. The plug on the mold is inserted into the aviation plug, and the heating wire on the mold is powered to heat.

[0004] In the above-mentioned related technology, an L-shaped support arm is installed on the upper part of the mold, and a motor or other equipment for driving the mold to rotate is installed on the lower part of the L-shaped support arm. The mold itself and the driving equipment are heavy structures, so the L-shaped support arm can only bear the weight of one side of the mold and the driving structure.

[0005] In the molding process, in order to improve the processing efficiency, a double-sided or multi-sided mold is designed. This design can realize the rotational molding of multiple products through one-time processing. The current similar support arm has a frame structure, which occupies a large space from top to bottom, and the mold has a large relative rotation radius, which consumes a lot of energy. Therefore, it is necessary to provide a relatively thin support arm and reasonably solve the problem of rotating mold heating and power supply. UTILITY MODEL CONTENTS

[0006] The utility model provides a rotating support arm of a rotational molding machine to solve the problems in the prior art.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A rotating support arm of a rotational moulding machine, comprising a support arm body, an upper mould tray, a lower mould tray, a driving mechanism and a power supply slip ring structure, the driving mechanism is used to drive the upper mould tray and the lower mould tray to rotate, the upper mould tray and the lower mould tray are respectively installed on two sides of the support arm body, the upper mould and the lower mould are respectively clamped on the upper mould tray and the lower mould tray, and the power supply slip ring structure is used to supply power to the upper mould and the lower mould.

[0009] The technical effect of the above technical scheme is that the upper mould tray and the lower mould tray are respectively arranged on the upper and lower sides of the support arm body, the mould is clamped on the upper mould tray and the lower mould tray, the upper mould tray and the lower mould tray can be driven to rotate synchronously under the action of the driving mechanism, the power supply slip ring structure supplies power to the upper mould and the lower mould, the purpose of processing multiple products at a time is achieved, the production and processing efficiency is greatly improved, and the support arm structure is compact, occupies less space, the distance between the upper mould tray and the lower mould tray is small, and the relative energy consumption is small.

[0010] Further, the power supply slip ring structure comprises a first slip ring and a second slip ring, the first slip ring and the second slip ring are arranged in a back-to-back manner, the first slip ring is electrically connected with the upper mould, and the second slip ring is electrically connected with the lower mould.

[0011] Further, the first slip ring and the second slip ring are both gas-liquid electric slip rings, which are used to provide electricity, gas and hydraulic pressure.

[0012] Further, the upper mould tray and the lower mould tray are respectively installed on the two sides of the support arm body through rotary support bearings.

[0013] Further, the rotors of the first slip ring and the second slip ring are installed on the outer rings of the rotary support bearings through a connecting plate, and the stators of the first slip ring and the second slip ring are respectively installed on the inner rings of the rotary support bearings through fixing plates.

[0014] The technical effect of the above technical scheme is that when the outer ring of the rotary support bearing rotates, the rotors of the first slip ring and the second slip ring can be driven to rotate synchronously, so as to avoid the situation that the wire is broken.

[0015] Further, the driving mechanism is located in the interior of the support arm body and is used to drive the upper mould tray and the lower mould tray to rotate synchronously.

[0016] The technical effect of the above technical scheme is that the driving mechanism is arranged in the interior of the support arm body, thereby saving the occupied space of the driving mechanism.

[0017] Further, the driving mechanism comprises a motor arranged in the support arm body, a speed reducer is connected to the motor, the output shaft of the speed reducer extends to the upper mold tray and the lower mold tray respectively, and two driving gears are arranged on the output shaft of the speed reducer, the outer ring of the two slewing bearings is provided with an outer gear ring engaged with the driving gears, and the upper mold tray and the lower mold tray are driven to rotate synchronously through the engagement of the driving gears and the outer gear ring.

[0018] The technical effect of the above technical scheme is that the motor drives the output shaft of the speed reducer to rotate, drives the two driving gears to rotate, and drives the outer ring of the slewing bearing to rotate through the engagement of the driving gears and the outer gear ring of the slewing bearing, so that the upper mold tray and the lower mold tray installed on the outer ring of the slewing bearing are driven to rotate, thereby driving the upper mold and the lower mold to rotate synchronously.

[0019] Further, the support arm body is a straight arm.

[0020] The technical effect of the above technical scheme is that the straight arm structure of the support arm body replaces the existing L-shaped arm structure, the straight arm design of the support arm body occupies less space and has reduced manufacturing cost, and the upper mold tray and the lower mold tray are arranged on the upper and lower surfaces of the support arm body, so that one support arm can process multiple products by rotational molding, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the support arm of the embodiment of the utility model;

[0022] Figure 2 It is a structural schematic view of the support arm of the embodiment of the utility model; Figure 1 It is an enlarged view of part A in the figure;

[0023] Figure 3 It is a structural schematic view of the support arm of the embodiment of the utility model;

[0024] Figure 4 It is a top view of the embodiment of the utility model;

[0025] Figure 5 It is a sectional view of the embodiment of the utility model;

[0026] Figure 6 It is a structural schematic view of the back-to-back arrangement of the first sliding ring and the second sliding ring of the embodiment of the utility model.

[0027] Explanation of reference signs: 1, support arm body; 2, first slip ring; 3, second slip ring; 4, driving mechanism; 5, motor; 6, speed reducer; 7, driving gear; 8, outer gear; 9, rotary support bearing; 10, upper mold tray; 11, lower mold tray; 12, connecting plate; 13, fixed plate. DETAILED DESCRIPTION

[0028] The principles and features of the present application are described below in conjunction with all the drawings, and the examples are only used to explain the present application and not to limit the scope of the present application.

[0029] The embodiment of the present application discloses a rotary support arm of a rotational molding machine.

[0030] Reference Figures 1-6 A rotary support arm of a rotational molding machine, comprising a support arm body 1, an upper mold tray 10, a lower mold tray 11, a driving mechanism 4 and a power supply slip ring structure. Both ends of the support arm body 1 are installed on the side support arm of the rotational molding machine through bearings, the driving mechanism 4 is used to drive the upper mold tray 10 and the lower mold tray 11 to rotate, the upper mold tray 10 and the lower mold tray 11 are respectively installed on both sides of the support arm body 1, the upper mold tray 10 and the lower mold tray 11 are respectively installed on both sides of the support arm body 1 through rotary support bearings 9, and the power supply slip ring structure is used to supply power to the upper mold and the lower mold.

[0031] The support arm body 1 is a straight arm, the straight arm structure of the support arm body 1 replaces the existing L-arm structure, the straight arm design of the support arm body 1 occupies less space, the manufacturing cost is reduced, and the upper mold tray 10 and the lower mold tray 11 are arranged on the upper and lower surfaces of the support arm body 1, so that the purpose of processing multiple products by one support arm is achieved, and the production efficiency is greatly improved.

[0032] The upper mold tray 10 and the lower mold tray 11 are arranged on the upper and lower surfaces of the support arm body 1 respectively, and the molds are clamped on the upper mold tray 10 and the lower mold tray 11 respectively, so that two molds on one set of equipment work at the same time, compared with single processing of a single mold, the production efficiency is greatly improved. The upper mold tray 10 and the lower mold tray 11 can be driven to rotate synchronously under the action of the driving mechanism 4, the upper mold tray 10 and the lower mold tray 11 drive the upper mold and the lower mold to rotate synchronously when rotating, and the driving mechanism 4 is arranged in the inside of the support arm body 1, so that no extra space is occupied. The power supply slip ring structure simultaneously heats and supplies power to the upper mold and the lower mold, so that the purpose of processing multiple products at a time is achieved, and the production and processing efficiency is greatly improved.

[0033] The driving mechanism 4 comprises a motor 5 arranged in the support arm body 1, the motor 5 is connected with a speed reducer 6, two ends of an output shaft of the speed reducer 6 respectively extend to two mold trays, and two driving gears 7 are arranged on the output shaft of the speed reducer 6, the outer rings of two slewing bearings 9 are respectively provided with outer gear rings 8 engaged with the driving gears 7, and the upper mold tray 10 and the lower mold tray 11 are connected with the outer rings of the slewing bearings 9, so that the upper mold tray 10 and the lower mold tray 11 can be driven to rotate when the driving gears 7 and the outer gear rings 8 are engaged. The inner part of the slewing bearing 9 is a circular ring structure, which can avoid space to install the power slip ring structure. The motor 5 drives the output shaft of the speed reducer 6 to rotate, drives the two driving gears 7 to rotate, the driving gears 7 drive the outer gear rings 8 to rotate, and the outer gear rings 8 drive the upper mold tray 10 and the lower mold tray 11 to rotate synchronously, thereby driving the upper mold and the lower mold to rotate synchronously.

[0034] It should be noted that in the embodiment, the two driving gears 7 are driven to rotate by one speed reducer 6, so that the two outer gear rings 8 are engaged with the corresponding driving gears 7 respectively, and the upper mold tray 10 and the lower mold tray 11 are driven to rotate synchronously, thereby ensuring the synchronism of the two mold trays and the two molds when rotating.

[0035] The power slip ring structure comprises a first slip ring 2 and a second slip ring 3, the first slip ring 2 and the second slip ring 3 are arranged in a back-to-back manner, as shown in Figure 6 The first slip ring 2 is electrically connected with the upper mold, and the second slip ring 3 is electrically connected with the lower mold. Further, the first slip ring 2 and the second slip ring 3 are both gas-liquid electric slip rings, which are used to provide electricity, gas and hydraulic pressure.

[0036] Further, the rotors of the first slip ring 2 and the second slip ring 3 are installed on the outer rings of the slewing bearings 9 through the connecting plates 12, and the stators of the first slip ring 2 and the second slip ring 3 are respectively installed on the inner rings of the slewing bearings 9 through the fixed plates 13, as shown in Figure 3 When the outer rings of the slewing bearings 9 rotate, the rotors of the first slip ring 2 and the second slip ring 3 can rotate synchronously to avoid the situation that the wire is broken.

[0037] It should be noted that: the first slip ring 2 and the second slip ring 3 are arranged in back-to-back mode, the first slip ring 2 and the second slip ring 3 are symmetrically arranged, the first slip ring 2 and the second slip ring 3 are the same structure, the first slip ring 2 and the second slip ring 3 are the same connection with the slewing bearing 9, taking the first slip ring 2 as an example, the first slip ring 2 comprises a rotor and a stator, the stator is mounted on the outside of the rotor through a bearing, and a conductive ring (not shown in the figure) is arranged between the stator and the rotor; the wire is led out from the rotor after passing through the conductive ring from the stator, and the wire is electrically connected with the upper mold after being led out from the rotor; the rotor of the first slip ring 2 is connected with the outer ring of the slewing bearing 9 through the connecting plate 12, and the outer ring of the slewing bearing 9 is driven to rotate by the outer gear ring 8, so when the outer ring of the slewing bearing 9 rotates, the connecting plate 12 will be driven to rotate, and then the rotor of the first slip ring 2 will be driven to rotate, and the outer ring of the slewing bearing 9 is fixed on the upper mold tray 10, so the rotation of the rotor of the first slip ring 2 and the upper mold tray 10 is synchronous; the stator of the first slip ring 2 can be fixed on the inner ring of the slewing bearing 9 through the fixing plate 13, and the inner ring of the slewing bearing 9 does not rotate, so the stator of the first slip ring 2 can be fixed.

[0038] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotating support arm for a rotational molding machine, characterized in that: The device includes a support arm body (1), an upper mold tray (10), a lower mold tray (11), a drive mechanism (4), and a power supply slip ring structure. The drive mechanism (4) is used to drive the upper mold tray (10) and the lower mold tray (11) to rotate. The upper mold tray (10) and the lower mold tray (11) are respectively installed on both sides of the support arm body (1). The upper mold and the lower mold are respectively clamped on the upper mold tray (10) and the lower mold tray (11). The power supply slip ring structure is used to supply power to the upper mold and the lower mold.

2. The rotating support arm of a rotational molding machine according to claim 1, characterized in that: The power supply slip ring structure includes a first slip ring (2) and a second slip ring (3). The first slip ring (2) and the second slip ring (3) are arranged back to back. The first slip ring (2) is electrically connected to the upper mold, and the second slip ring (3) is electrically connected to the lower mold.

3. The rotating support arm of a rotational molding machine according to claim 2, characterized in that: The first slip ring (2) and the second slip ring (3) are both gas-hydraulic-electric slip rings, used to provide electricity, gas and hydraulic pressure.

4. A rotating support arm for a rotational molding machine according to claim 2 or 3, characterized in that: The upper mold tray (10) and the lower mold tray (11) are respectively mounted on both sides of the support arm body (1) via slewing bearings (9).

5. The rotating support arm of a rotational molding machine according to claim 4, characterized in that: The rotors of the first slip ring (2) and the second slip ring (3) are respectively mounted on the outer ring of the slewing bearing (9) via a connecting plate (12), and the stators of the first slip ring (2) and the second slip ring (3) are respectively mounted on the inner ring of the slewing bearing (9) via a fixing plate (13).

6. The rotating support arm of a rotational molding machine according to claim 1, characterized in that: The drive mechanism (4) is located inside the support arm body (1) and is used to drive the upper mold tray (10) and the lower mold tray (11) to rotate synchronously.

7. The rotating support arm of a rotational molding machine according to claim 5, characterized in that: The drive mechanism (4) includes a motor (5) located inside the support arm body (1). The motor (5) is connected to a reducer (6). The two ends of the output shaft of the reducer (6) extend to the upper mold tray (10) and the lower mold tray (11) respectively. Two drive gears (7) are provided on the output shaft of the reducer (6). The outer rings of the two slewing bearings (9) are provided with external gear rings (8) that mesh with the drive gears (7). The upper mold tray (10) and the lower mold tray (11) are driven to rotate synchronously through the meshing of the drive gears (7) and the external gear rings (8).

8. The rotating support arm of a rotational molding machine according to claim 1, characterized in that: The support arm body (1) is a straight arm.

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