CN210082329U

CN210082329U - Ejection mechanism of plastic injection mold

Info

Publication number: CN210082329U
Application number: CN201920866065.2U
Authority: CN
Inventors: 张梦雅
Original assignee: Foshan Juhong Plastic Products Co Ltd
Current assignee: Foshan Juhong Plastic Products Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-02-18
Anticipated expiration: 2029-06-11

Abstract

The utility model discloses a plastics injection mold's ejection mechanism, including last mould, ejecting subassembly and lower mould, ejecting subassembly is installed on the lower mould, ejecting subassembly includes ejector pin and internal thread cover, the hypomere surface of ejector pin is equipped with the screw thread and rotates the inside of installing at the internal thread cover through the screw thread, the pivot is still installed through the bearing frame in the bottom of lower mould, the gear is all installed at the both ends of pivot, the both sides of going up the mould are fixed with the upper ear plate, be fixed with the montant on the upper ear plate, be fixed with the toothed plate cover on the montant. This practicality is removed through last mould drive toothed plate cover on the montant to utilize toothed plate cover and gear to mesh, the countershaft drives, and then utilizes the worm wheel on the epaxial worm cover drive ejecting subassembly of pivot to rotate, utilizes internal thread cover drive ejector pin rebound, and it is ejecting to carry out the time delay back with the injection molding, through the mounting height of adjustment toothed plate cover, can control delay time, convenient operation.

Description

Ejection mechanism of plastic injection mold

Technical Field

The utility model belongs to the technical field of the mould ejecting device, concretely relates to plastics injection mold's ejection mechanism.

Background

The injection mold is a tool for producing plastic products, and is divided into a thermosetting plastic mold and a thermoplastic plastic mold according to the molding characteristics; the molding process includes transfer molding, blow molding, cast molding, thermoforming, hot pressing (compression molding), injection molding, etc. The existing injection mold usually adopts the ejector pin to eject out the injection product in the using process, and a set of power control system is needed to drive the ejector pin to move, so that the equipment investment cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a plastics injection mold's ejection mechanism to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an ejection mechanism of plastics injection mold, includes upper die, ejection subassembly and lower mould, the ejection subassembly is installed on the lower mould, the ejection subassembly includes ejector pin and internal thread cover, the bottom of bearing frame and lower mould is passed through to the upper end of internal thread cover is rotated and is connected, the hypomere surface of ejector pin is equipped with the screw thread and rotates through the screw thread and install the inside at internal thread cover, the upper segment of ejector pin is smooth section and smooth section activity runs through the through-hole on the lower mould and extends to the model intracavity and be connected through bearing frame and roof lower surface center department, the pivot is still installed through the bearing frame to the bottom of lower mould, equidistant worm cover of installing in the pivot, the bottom pin-jointed worm wheel of internal thread cover, the worm wheel meshes with worm cover respectively, the gear is all installed at the both ends of pivot, the both sides of upper die are fixed with the upper, and a toothed plate sleeve is fixed on the vertical rod.

Preferably, the smooth section side of the upper section of the ejector rod is integrally provided with a smooth bulge, the side wall of the through hole on the lower die is provided with a sliding groove, and the smooth bulge is arranged in the sliding groove in a sliding manner.

Preferably, the toothed plate sleeve is sleeved on the vertical rod and fixed with the vertical rod through a bolt, bolt holes with different heights are formed in the vertical rod, and one side with teeth on the toothed plate sleeve is meshed with the gear.

Preferably, a lower ear plate is further fixed to the side edge of the lower die, and the vertical rod movably penetrates through the lower ear plate.

The utility model discloses a technological effect and advantage:

when the upper die moves upwards, the toothed plate sleeve on the vertical rod is driven to move simultaneously, so that the toothed plate sleeve is meshed with the gear, the rotating shaft is driven, the worm gear on the rotating shaft is driven to rotate by the worm sleeve on the rotating shaft, the ejector rod is driven to move upwards by the internal thread sleeve, the injection molding piece is ejected after being delayed, and the delay time can be controlled by adjusting the installation height of the toothed plate sleeve, so that the injection molding machine is convenient to operate.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the ejection assembly of the present invention;

fig. 3 is a schematic diagram of the structure of the toothed plate sleeve of the present invention.

In the figure: 1 upper die, 2 upper lug plates, 3 lower lug plates, 4 vertical rods, 5 toothed plate sleeves, 6 rotating shafts, 7 ejection assemblies, 701 top plates, 702 ejector rods, 703 smooth protrusions, 704 internal thread sleeves, 705 worm gears, 8 worm sleeves, 9 gears and 10 lower dies.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, an ejection mechanism of a plastic injection mold comprises an upper mold 1, an ejection assembly 7 and a lower mold 10, wherein the ejection assembly 7 is installed on the lower mold 10, the ejection assembly 7 comprises a top rod 702 and an internal thread sleeve 704, the upper end of the internal thread sleeve 704 is rotatably connected with the bottom end of the lower mold 10 through a bearing seat, the lower section surface of the top rod 702 is provided with threads and rotatably installed inside the internal thread sleeve 704 through the threads, the upper section of the top rod 702 is a smooth section, the smooth section movably penetrates through a through hole on the lower mold 10 and extends into a mold cavity and is connected with the center of the lower surface of the top plate 701 through the bearing seat, the bottom of the lower mold 10 is further provided with a rotating shaft 6 through the bearing seat, worm sleeves 8 are equidistantly installed on the rotating shaft 6, a worm wheel 705 is pinned at the bottom end of, the gear 9 is all installed at the both ends of pivot 6, the both sides of going up mould 1 are fixed with otic placode 2, be fixed with montant 4 on going up otic placode 2, be fixed with toothed plate cover 5 on the montant 4.

The side surface of the smooth section of the upper section of the ejector rod 702 is integrally provided with a smooth bulge 703, the side wall of the through hole on the lower die 10 is provided with a sliding groove, and the smooth bulge 703 is arranged in the sliding groove in a sliding manner. The smooth protrusions 703 are limited by the sliding grooves, so that the ejector rod 702 can only move up and down to avoid autorotation, and the ejector rod 702 is driven to move up and down by the rotation of the internal thread sleeve 704 to complete ejection of the injection molding part.

The toothed plate sleeve 5 is sleeved on the vertical rod 4, the toothed plate sleeve 5 is fixed with the vertical rod 4 through a bolt, bolt holes with different heights are formed in the vertical rod 4, and one side with teeth on the toothed plate sleeve 5 is meshed with the gear 9. By adjusting the fixed height of the gear plate sleeve 5, when the upper die 1 is separated, delayed ejection can be performed according to the distance between the gear plate sleeve 5 and the gear 9. When the gear 9 passes completely through the gear plate sleeve 5, the ejector pin 702 will be fully ejected.

The side of the lower die 10 is also fixed with a lower ear plate 3, and the vertical rod 4 movably penetrates through the lower ear plate 3. Be equipped with the through-hole that is used for montant 4 to pass on the otic placode 3 down, can stabilize the motion of montant 4, prevent montant 4 slope, be favorable to keeping toothed plate cover 5 and gear 9 to carry out the transmission.

Specifically, during the use, the back of moulding plastics is accomplished, it carries out the die sinking to go up mould 1 and move, when last mould 1 moves up, it removes to drive the toothed plate cover 5 on the montant 4 simultaneously, thereby utilize toothed plate cover 5 and gear 9 to mesh, the countershaft 6 drives, and then utilize worm cover 8 on the pivot 6 to drive the worm wheel 705 on the ejecting subassembly 7 and rotate, utilize internal thread cover 704 drive ejector pin 702 rebound, thereby it is ejecting after delaying the injection molding, through the mounting height of adjustment toothed plate cover 5, can control the delay time, and convenient for operation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a plastics injection mold's ejection mechanism, includes mould (1), ejecting subassembly (7) and lower mould (10), ejecting subassembly (7) are installed on lower mould (10), its characterized in that: the ejection assembly (7) comprises an ejector rod (702) and an internal thread sleeve (704), the upper end of the internal thread sleeve (704) is rotatably connected with the bottom end of a lower die (10) through a bearing seat, threads are arranged on the surface of the lower section of the ejector rod (702) and rotatably installed inside the internal thread sleeve (704) through the threads, the upper section of the ejector rod (702) is a smooth section, the smooth section movably penetrates through a through hole in the lower die (10) to extend into a model cavity and is connected with the center of the lower surface of a top plate (701) through the bearing seat, a rotating shaft (6) is further installed at the bottom of the lower die (10) through the bearing seat, worm sleeves (8) are installed on the rotating shaft (6) at equal intervals, a worm wheel (705) is connected to the bottom end of the internal thread sleeve (704) in a pin mode, the worm wheels (705) are respectively meshed with, the improved die is characterized in that upper ear plates (2) are fixed on two sides of the upper die (1), vertical rods (4) are fixed on the upper ear plates (2), and a toothed plate sleeve (5) is fixed on the vertical rods (4).

2. The ejection mechanism of a plastic injection mold according to claim 1, wherein: smooth section side of ejector pin (702) upper segment is provided with smooth arch (703) in an integrated manner, be equipped with the spout on the through-hole lateral wall on lower mould (10), smooth arch (703) slide to set up in the spout.

3. The ejection mechanism of a plastic injection mold according to claim 1, wherein: the toothed plate sleeve (5) is sleeved on the vertical rod (4), the toothed plate sleeve (5) is fixed with the vertical rod (4) through bolts, bolt holes with different heights are formed in the vertical rod (4), and one side with teeth on the toothed plate sleeve (5) is meshed with the gear (9).

4. The ejection mechanism of a plastic injection mold according to claim 1, wherein: the side of the lower die (10) is also fixed with a lower ear plate (3), and the vertical rod (4) movably penetrates through the lower ear plate (3).