Polyurethane pouring annular guide rail assembly line

Abstract

The utility model belongs to the technical field of plastic forming, and discloses a polyurethane pouring annular guide rail assembly line which comprises an annular conveying chain (1), and the annular conveying chain (1) is fixedly connected with a mold seat (3) through a connecting piece (2). The bottom surface of the die seat (3) is attached to the upper plane of the guide rail (4), rotating shafts (5) are symmetrically mounted on the bottom surface of the die seat (3), pulleys (6) are mounted on the rotating shafts (5), and the pulleys (6) are clamped in sliding grooves (7) in the side surfaces of the guide rail (4); a pit (8) is formed in the bottom face of the die base (3), and a ball (9) is arranged in the pit (8) and abuts against the top face of the pulley (6). A positioning hole (10) is formed in the die base (3) and matched with a telescopic rod (12) of a telescopic air cylinder (11), and the telescopic air cylinder (11) is fixed to a fixing frame (13). The complex layout of inner and outer double rails is omitted, and the investment and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic forming, specifically is polyurethane pouring annular guide rail assembly line. BACKGROUND

[0002] At present, the annular assembly line for making shoes adopts double guide rail form, one guide rail is located in the inner ring, and the other guide rail is located in the outer ring, the bottom of the mold base is correspondingly provided with a pulley located on the inner side and a pulley located on the outer side, and the pulleys are slidingly arranged on the annular guide rail. The mold base is carried by two guide rails, and the investment and maintenance cost is relatively high.

[0003] The patent application with the publication number CN213166443U discloses a polyurethane pouring annular assembly line, which comprises a base, an annular conveying device and a mold base for placing a mold. The annular conveying device comprises a transmission power source, a transmission chain and a transmission sprocket. The transmission chain is wound around the transmission sprocket. The inner end of the mold base is hingedly connected to the transmission chain. The base has a support platform located at the periphery of the transmission chain. The support platform is provided with annular guide rails. The annular guide rails have two guide rails, one located in the inner ring and the other located in the outer ring. The bottom of the mold base is also correspondingly provided with a pulley located on the inner side and a pulley located on the outer side. The pulleys are slidingly arranged on the annular guide rail. The assembly line adopts two guide rails, which has high investment and maintenance cost. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of providing a polyurethane pouring annular guide rail assembly line which eliminates the complex layout of inner and outer double rails and reduces the investment and maintenance cost.

[0005] In order to solve the above technical problems, the utility model provides a polyurethane pouring annular guide rail assembly line, which comprises an annular transmission chain. The mold base is fixedly connected to the annular transmission chain through a connecting piece. The bottom surface of the mold base is attached to the upper surface of the guide rail. The bottom surface of the mold base is symmetrically provided with a rotating shaft. The rotating shaft is provided with a pulley. The pulley is clamped in the sliding groove on the side surface of the guide rail. The bottom surface of the mold base is provided with a recess. The recess is provided with a ball. The ball abuts against the top surface of the pulley. The recess is located on the outer edge of the mold base. The mold base is provided with a positioning hole. The positioning hole cooperates with the extension rod of the telescopic cylinder. The telescopic cylinder is fixedly connected to the fixed frame.

[0006] By adopting the above technical scheme, only one annular guide rail is needed. The mold base is installed on the guide rail by two pulleys. The complex layout of inner and outer double rails is eliminated. The symmetric rotating shaft on the bottom of the mold base and the pulley embedded in the sliding groove on the side surface of the guide rail realize the guidance. The processing length of the guide rail is reduced by about 50%. The material cost is reduced by 30%-40%. The ball in the recess applies vertical pre-tightening force to the pulley, which inhibits the lateral shaking of the mold base.

[0007] Preferably, a lubricating layer is arranged between the bottom surface of the mold base and the upper surface of the guide rail.

[0008] By adopting the technical scheme, friction between the mold base and the guide rail is greatly reduced, acceleration fluctuation of the mold base is inhibited, and influence of resonance on precision molding is avoided.

[0009] Preferably, the four corners of the mold base are chamfered with a circular arc.

[0010] By adopting the technical scheme, the four corners of the mold base are chamfered with a circular arc, so that the mold base is prevented from being damaged due to collision during operation.

[0011] Preferably, the rotating shaft is two, and is symmetrically arranged on the two sides of the guide rail.

[0012] By adopting the technical scheme, the pulley is arranged on the rotating shaft, the weight of the mold base and working load (such as pouring forming pressure) are evenly distributed to the two sides of the guide rail, and overloading on one side is avoided.

[0013] Preferably, the diameter of the recess is D = d + 2 x play.

[0014] Wherein D: the diameter of the recess; d: the diameter of the ball; the play is 1%~5% of the diameter of the ball.

[0015] By adopting the technical scheme, it is ensured that the ball can roll freely, and instability caused by too large gap is avoided.

[0016] Preferably, the front end of the positioning hole has a horn-shaped entrance.

[0017] By adopting the technical scheme, the telescopic rod of the telescopic cylinder is more easily inserted into the positioning hole.

[0018] Preferably, the guide rail is provided with a heat dissipation hole.

[0019] By adopting the technical scheme, the heat dissipation hole helps to discharge heat generated inside the guide rail, maintains normal working temperature of the guide rail, and prolongs service life of the guide rail.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1. The utility model only needs one annular guide rail, the mold base is installed on the guide rail by two pulleys, the complex layout of the inner and outer double rails is saved, the symmetric rotating shaft plus pulley of the bottom of the mold base is embedded into the sliding groove on the side of the guide rail to realize guiding, the processing length of the guide rail is reduced by about 50%, the material cost is reduced by 30%~40%, and the investment and maintenance cost are effectively reduced.

[0022] 2. The ball in the recess applies vertical pre-tightening force to the pulley, inhibits transverse shaking of the mold base, and improves running stability of the mold base.

[0023] 3. The utility model discloses a telescopic air cylinder realizes rigid locking after the die holder is in place through the positioning hole, solves the positioning deviation problem caused by inertia or vibration in annular conveying. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the perspective view of the utility model;

[0025] Figure 2 It is the plan view of the utility model;

[0026] Figure 3 It is the die holder and the assembly diagram of pulley group of the utility model;

[0027] Figure 4 It is the die holder structure schematic view of the utility model.

[0028] Figure number: 1. Annular conveying chain, 2. Connecting piece, 3. Die holder, 4. Guide rail, 5. Pivot, 6. Pulley, 7. Slide groove, 8. Pit, 9. Ball, 10. Positioning hole, 11. Telescopic air cylinder, 12. Telescopic rod, 13. Fixed frame, 14. Inlet, 15. Radiating hole. DETAILED DESCRIPTION

[0029] As Figure 1 Shown, polyurethane pouring annular guide rail 4 assembly line, including annular conveying chain 1, annular conveying chain 1 is fixedly connected with die holder 3 through connecting piece 2.Die holder 3 bottom surface and guide rail 4 upper surface are attached, and the bottom surface of die holder 3 is symmetrically installed with pivot 5, which is screwed into the bottom surface of die holder 3 or welded to the bottom surface of die holder 3.Pivot 5 is installed with pulley 6, and pulley 6 is clamped in slide groove 7 on the side of guide rail 4.To avoid pulley 6 from shaking, pit 8 is arranged on the bottom surface of die holder 3, ball 9 is arranged in pit 8, ball 9 abuts against the top surface of pulley 6, and pit 8 is close to the outer edge of die holder 3.Positioning hole 10 is arranged on die holder 3, and positioning hole 10 cooperates with telescopic rod 12 of telescopic air cylinder 11, telescopic air cylinder 11 is fixed on fixed frame 13, and fixed frame 13 is installed on the inner wall of pouring frame.Only one annular guide rail 4 is needed in the application, and die holder 3 is driven and installed on guide rail 4 by two pulleys 6, so that the complex layout of inner and outer rails is saved, the length of guide rail 4 is reduced by about 50%, and the material cost is reduced by 30% to 40%.Ball 9 in pit 8 exerts vertical pre-tightening force on pulley 6, and inhibits the lateral shaking of die holder 3.Telescopic air cylinder 11 realizes rigid locking after die holder 3 is in place through positioning hole 10, and solves the positioning deviation problem caused by inertia or vibration in annular conveying.

[0030] As Figure 2As shown, the guide rail 4 is provided with heat dissipation holes 15. The heat dissipation holes 15 help to discharge the heat generated inside the guide rail 4, maintain the normal working temperature of the guide rail 4, and prolong the service life of the guide rail 4.

[0031] A lubricating layer is arranged between the bottom surface of the mold seat 3 and the upper surface of the guide rail 4. The lubricating layer is a graphite layer, which has good lubricating performance and heat conduction function. The friction between the contact surfaces of the mold seat 3 and the guide rail 4 is greatly reduced, the acceleration fluctuation of the mold seat 3 is inhibited, and the influence of resonance on precision molding is avoided.

[0032] The mold seat 3 is provided with circular chamfers at four corners. The corners of the mold seat 3 are prevented from being damaged due to collision during operation.

[0033] As shown in the drawings, Figure 3 The rotating shaft 5 is symmetrical arranged at both sides of the guide rail 4. The pulley 6 is arranged on the rotating shaft 5, which uniformly distributes the weight of the mold seat 3 and the working load (such as the pressure of injection molding) to both sides of the guide rail 4, avoiding overloading on one side.

[0034] As shown in the drawings, Figure 4 The diameter of the recess 8 is D=d+2x clearance. Wherein D: the diameter of the recess 8; d: the diameter of the ball 9; the clearance is 1%~5% of the diameter of the ball 9, or refers to the bearing clearance standard. It ensures that the ball 9 can roll freely, while avoiding instability caused by too large clearance. The front end of the positioning hole 10 has a horn-shaped entrance 14. The telescopic rod 12 of the telescopic cylinder 11 is more easily inserted into the positioning hole 10.

[0035] During operation, the annular conveying chain 1 is started to rotate, the mold seat 3 is guided by the symmetric rotating shaft 5 and the pulley 6, and the mold seat 3 drives the mold to move forward on the guide rail 4. When the mold seat 3 reaches the position, the telescopic rod 12 of the telescopic cylinder 11 is inserted into the positioning hole 10 to realize positioning and locking of the mold seat 3.

[0036] Those skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structure principle of the utility model have been shown and described in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A polyurethane casting annular guide rail assembly line, comprising an annular conveying chain (1), a mold base (3) is fixedly connected on the annular conveying chain (1) through a connecting piece (2), characterized in that: The bottom surface of the mold seat (3) is flatly attached to the upper surface of the guide rail (4), the bottom surface of the mold seat (3) is symmetrically installed with a rotating shaft (5), the rotating shaft (5) is installed with a pulley (6), the pulley (6) is clamped in the sliding groove (7) on the side of the guide rail (4); the bottom surface of the mold seat (3) is provided with a pit (8), the pit (8) is provided with a ball (9), the ball (9) abuts against the top surface of the pulley (6), the pit (8) is close to the outer edge of the mold seat (3); the mold seat (3) is provided with a positioning hole (10), the positioning hole (10) is matched with the telescopic rod (12) of the telescopic cylinder (11), and the telescopic cylinder (11) is fixed on the fixed frame (13).

2. The polyurethane cast annular rail assembly line according to claim 1, characterized in that: A lubricating layer is arranged between the bottom surface of the mold seat (3) and the upper surface of the guide rail (4).

3. The polyurethane cast annular rail assembly line according to claim 1, wherein: The four corners of the mold seat (3) are circularly chamfered.

4. The polyurethane cast annular rail assembly line according to claim 1, wherein: The rotating shaft (5) is two, symmetrically arranged on both sides of the guide rail (4).

5. The polyurethane cast annular rail assembly line of claim 1, wherein: The diameter of the pit (8) is D=d+2xplay; Where D: the diameter of the pit (8); D: the diameter of the pit (8); d: the diameter of the ball (9); the play is 1%-5% of the diameter of the ball (9).

6. The polyurethane cast annular rail assembly line according to claim 1, wherein: The front end of the positioning hole (10) has a horn-shaped entrance (14).

7. The polyurethane cast annular rail assembly line according to claim 1, wherein: The guide rail (4) is provided with a heat dissipation hole (15).

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