Guide rail type fixed-distance drag hook structure of injection mold

Abstract

The utility model belongs to the field of injection molds, and mainly relates to a guide rail type fixed-distance drag hook structure of an injection mold, which comprises a fixed-distance drag hook arranged between a fixed mold part and a movable mold part of the mold, and the fixed-distance drag hook is of a guide rail type and comprises a pull rod rotationally connected to the outer wall of the movable mold part and a clamping block fixedly mounted on the outer wall of the fixed mold part. The pull rod is provided with a drag hook, the drag hook is matched with the clamping block, two side walls of the pull rod are provided with rollers, the outer wall of the movable mold part corresponding to the rollers is provided with corresponding pull rod rotating guide pieces, and the rollers are matched with the pull rod rotating guide pieces. Compared with the prior art, the scheme has the advantages that the action is more stable and reliable, particularly the defects that the spring is easy to deform and short in service life are overcome, the shutdown maintenance frequency is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of injection mold guide rail type fixed-distance pull hook structure, belong to injection mold field. BACKGROUND

[0002] Injection mold is one of the commonly used molds for producing plastic products. According to the analysis of product structure and appearance, the demolding structure of products with complex features is often also complex, and even secondary mold opening is required to achieve demolding. The structure for secondary mold opening of injection mold currently usually adopts fixed-distance pull hook structure, and the pull hook is separated by spring extrusion contraction. In use, the spring is prone to deformation and rust, and the spring is prone to failure, with short service life. SUMMARY

[0003] The utility model aims at overcoming the shortcomings of the prior art, and provides an injection mold guide rail type fixed-distance pull hook structure which drives a pull rod to rotate by using a guide rail, so that the pull hook smoothly separates from the hook, is stable in use, and has long service life.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An injection mold guide rail type fixed-distance pull hook structure includes a fixed-distance pull hook arranged between a fixed mold part and a movable mold part of a mold. The fixed-distance pull hook is of a guide rail type, and includes a pull rod rotatably connected to an outer wall of the movable mold part, and a clamping block fixedly installed on an outer wall of the fixed mold part. A pull hook is arranged on the pull rod, and the pull hook cooperates with the clamping block. Rollers are arranged on both side walls of the pull rod. Corresponding pull rod rotating guides are arranged on the outer wall of the movable mold part corresponding to the rollers. The rollers cooperate with the pull rod rotating guides.

[0006] Further, the pull rod rotating guides include guide fixed blocks, the guide fixed blocks are fixed on the outer wall of the movable mold part by screws, straight guide grooves and inclined guide grooves are arranged in the guide fixed blocks, and the rollers cooperate with the straight guide grooves and the inclined guide grooves.

[0007] Further, a rotating pin is arranged at the bottom of the pull rod, a connecting block is arranged on the outer wall of the movable mold part, a rotating connection hole is arranged in the connecting block, and the rotating pin is connected to the rotating connection hole.

[0008] Further, a pad block is arranged on the pull hook, and the pad block cooperates with the clamping block.

[0009] The injection mold guide rail type fixed-distance pull hook structure of the utility model drives the pull rod to rotate by using a guide rail, so that the pull hook separates from the clamping block. Compared with the prior art, the action is more stable and reliable, and the shortcomings of spring deformation and short service life are overcome. The number of maintenance stops is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a guide rail type fixed distance pull hook structure schematic diagram of the utility model;

[0011] Figure 2 is a guide rail type fixed distance pull hook section schematic diagram of the utility model;

[0012] Figure 3 is a guide rail type fixed distance pull hook installation in the mold using state schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The utility model will be explained in detail in combination with specific implementation cases, and the following implementation cases will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form.

[0014] As Figure 1 - Figure 3 The utility model relates to a kind of injection mold guide rail type fixed distance pull hook structure, including the fixed distance pull hook 3 being arranged between the fixed die part 1 and the movable die part 2 of mold, the fixed distance pull hook is guide rail type, including the pull rod 5 being rotatably connected on the outer wall of movable die part 2, and the clamping block 6 being fixedly installed on the outer wall of fixed die part 1, pull rod 5 is provided with pull hook 7, pull hook 7 is matched with clamping block 6, roller 8 is set on the two side walls of pull rod 5, corresponding pull rod rotating guide piece is set on the outer wall of movable die part 2 corresponding to roller 8, and roller 8 is matched with pull rod rotating guide piece. EMBODIMENT

[0015] The guide rail type fixed distance pull hook of the scheme can be used in the secondary mold opening process or secondary ejection process of injection mold, for example, automobile bumper mold, mostly adopts internal parting structure, and there is a big inclined ejector block at both ends in mold, which needs secondary mold opening and ejection, pull rod 5 is rotatably connected on the top plate 20 of movable die part, clamping block 6 is fixed on the fixed die plate 21 of fixed die part, pull rod rotating guide piece is fixed on the movable die plate 22 of movable die part, when opening mold, the opening and closing mold power of injection mold is used to drive movable die plate 22 and fixed die plate 21 to open and separate, but with the fixed distance pull hook 3, because pull hook 7 holds clamping block 6, movable die plate 22 and fixed die plate 21 are temporarily not separated, but opening action continues, and pull rod 5 drives top plate 20 to move reversely upward, because roller 8 is set on the two side walls of pull rod 5, roller 8 is matched with pull rod rotating guide piece, under the action of pull rod rotating guide piece, pull rod 5 rotates during the reverse upward movement of pull rod 5, and pull hook 7 is separated from clamping block 6, at this time, movable die plate 22 is separated from fixed die plate 21, and the secondary mold opening and ejection process is completed.

[0016] Further, the pull rod rotating guide piece comprises a guide fixed block 9 fixed on the outer wall of the movable mold part by a screw, a straight guide groove 10 and an inclined guide groove 14 are arranged in the guide fixed block 9, the roller 8 is matched with the straight guide groove 10 and the inclined guide groove 14, when the mold is opened, the roller 8 first rolls along the straight guide groove 10, at this time, the pull hook 7 pulls the clamping block 6, when the roller 8 rolls into the inclined guide groove 14, the pull rod 5 is rotated due to the rotating connection, and the pull hook 7 is separated from the clamping block 6.

[0017] Further, the bottom of the pull rod 5 is provided with a rotating pin 11, and a connecting block 12 is arranged on the outer wall of the movable mold part 2, a rotating connecting hole 13 is arranged in the connecting block, the rotating pin 11 is connected with the rotating connecting hole 13, and the pull rod is conveniently connected in rotation through the pin hole cooperation.

[0018] Further, the pull hook 7 is provided with a pad block 15 matched with the clamping block 6, the pad block is wear-resistant and replaceable, and the use cost is reduced.

[0019] The above specific embodiment is used to explain and illustrate the utility model, rather than limit the utility model, and any modification and change made to the utility model within the spirit and protection scope of the claims falls into the protection scope of the utility model.

Claims

1. A guide rail type fixed-distance hook structure for injection molds, comprising a fixed-distance hook (3) disposed between the fixed mold part (1) and the moving mold part (2) of the mold, characterized in that: The fixed-distance pull hook is a guide rail type, including a pull rod (5) rotatably connected to the outer wall of the moving mold part (2) and a locking block (6) fixedly installed on the outer wall of the fixed mold part (1). A pull hook (7) is provided on the pull rod (5), and the pull hook (7) cooperates with the locking block (6). Rollers (8) are provided on both sides of the pull rod (5), and corresponding pull rod rotation guides are provided on the outer wall of the moving mold part (2) corresponding to the rollers (8). The rollers (8) cooperate with the pull rod rotation guides.

2. The injection mold guide rail type fixed distance hook structure as described in claim 1, characterized in that... The pull rod rotation guide includes a guide fixing block (9), which is fixed to the outer wall of the moving mold part by screws. A straight guide rail groove (10) and an inclined guide rail groove (14) are provided in the guide fixing block (9), and the roller (8) cooperates with the straight guide rail groove (10) and the inclined guide rail groove (14).

3. The injection mold guide rail type fixed distance hook structure as described in claim 1, characterized in that... The bottom of the pull rod (5) is provided with a rotating pin (11), and a connecting block (12) is provided on the outer wall of the corresponding moving part (2). A rotating connecting hole (13) is provided in the connecting block, and the rotating pin (11) is connected to the rotating connecting hole (13).

4. The injection mold guide rail type fixed distance hook structure as described in claim 1, characterized in that... The hook (7) is provided with a pad (15), which cooperates with the locking block (6).

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