CN113942196A

CN113942196A - Direct-pressure primary and secondary cylinder of injection molding machine

Info

Publication number: CN113942196A
Application number: CN202111265234.5A
Authority: CN
Inventors: 唐亮亮
Original assignee: Yuyao Yingtu Mechanical Equipment Co ltd
Current assignee: Yuyao Yingtu Mechanical Equipment Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-18

Abstract

The invention relates to the technical field of injection molding machines, and discloses a direct-pressure type primary-secondary cylinder of an injection molding machine, which comprises a rear template, wherein a mold locking oil cylinder is embedded on the rear template, an oil absorption pressurizing assembly is arranged on the mold locking oil cylinder, the oil absorption pressurizing assembly comprises an oil cylinder cover arranged at the tail part of the mold locking oil cylinder, the oil cylinder cover is communicated with the mold locking oil cylinder, an oil inlet piece is arranged on the oil cylinder cover, a movable column matched with the oil inlet piece is arranged in the oil inlet piece, a first piston rod and a piston in the mold locking oil cylinder reciprocate to generate negative pressure in an oil storage cavity and the oil cylinder cavity, namely, a closed plate in the oil cylinder cover moves, oil is sucked into the oil cylinder cavity from the oil inlet piece to ensure sufficient power demand of the mold locking oil cylinder, the split mold locking layout oil cylinder is adopted to increase the number of the mold locking oil cylinders, the manufacturing cost is reduced, meanwhile, the mold locking oil cylinders are distributed, and the acting points of mold locking force are also distributed, the mold stress points used by the injection machine are also distributed stress, the mold locking force is more balanced under the same condition, and the stability of mold locking is ensured.

Description

Direct-pressure primary and secondary cylinder of injection molding machine

Technical Field

The invention relates to the technical field of injection molding machines, in particular to a direct-pressure primary and secondary cylinder of an injection molding machine.

Background

An injection molding machine is also known as an injection molding machine or an injection machine. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The device is divided into a vertical type, a horizontal type and a full-electric type. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

The injection molding machine is similar to the injection syringe for injection, and is a technological process of injecting plastic in a plasticized molten state (i.e. viscous state) into a closed die cavity by means of the thrust of a screw (or a plunger), and obtaining a product after solidification and shaping, wherein the injection molding is a cyclic process, and each period mainly comprises the following steps: quantitative feeding, melting and plasticizing, pressure injection, mold filling and cooling, mold opening and taking out, and closing the mold after taking out the plastic part for the next cycle.

At present, in the processing and manufacturing processes of a single-oil-cylinder direct-pressure type injection molding machine, no matter a built-in quick mold locking cylinder or an external quick mold locking cylinder, the cost is generally high, the mold locking effect is poor, the stress distribution of a mold of the injection molding machine is uneven, the mold of the injection molding machine is influenced to be opened and closed, the practicability is poor, and therefore the direct-pressure type primary and secondary cylinders of the injection molding machine are provided.

Disclosure of Invention

The invention aims to provide a direct-pressing type primary-secondary cylinder of an injection molding machine, which solves the problems that the mold locking effect is poor, the stress distribution of a mold of the injection molding machine is uneven, the opening and closing use of the mold of the injection molding machine is influenced, and the practicability is poor in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a direct-pressure primary-secondary cylinder of an injection molding machine comprises a rear template, wherein a mold locking oil cylinder is embedded in the rear template, an oil absorption pressurizing assembly is arranged on the mold locking oil cylinder, the oil absorption pressurizing assembly comprises an oil cylinder cover arranged at the tail of the mold locking oil cylinder, the end face of the oil cylinder cover is provided with a cover plate, a plurality of fixing holes are formed in the cover plate, the fixing hole holes are connected with an oil inlet cylinder cover through screws, the oil cylinder cover is communicated with the mold locking oil cylinder, an oil inlet piece is arranged on the oil cylinder cover, oil inlet holes distributed in a fan shape are formed in the oil inlet piece, a movable column matched with the oil inlet piece is arranged in the oil inlet piece, the end face of the movable column is connected with a sealing plate, an opening cavity and a closing cavity are separated from the movable column in the oil inlet piece, the oil cylinder cover is separated into an oil inlet cavity and an oil storage cavity by the sealing plate, and the side wall of the oil cylinder cover is provided with a high-pressure oil inlet, an oil cylinder cavity is arranged in the mode locking oil cylinder and communicated with the oil storage cavity;

a first piston rod is arranged in the oil cylinder cavity, the end face of the first piston rod positioned in the oil cylinder cavity is connected with a piston, the piston is attached to the inner wall of the oil cylinder cavity, the other end of the first piston rod is connected with a connecting buckle, the connecting buckle is connected with a connecting plate, and the outer wall of the connecting plate is connected with a movable template;

the mould locking device is characterized in that two rapid mould closing cylinders are arranged between the rear template and the movable template in a relative shape, the two rapid mould closing cylinders are respectively installed on the outer wall of the rear template and located on two sides of the mould locking oil cylinder, a second piston rod is arranged in each rapid mould closing cylinder, and the end face of each second piston rod is connected with the movable template.

Preferably, the mode locking hydro-cylinder is equipped with a plurality ofly, and a plurality of mode locking hydro-cylinder evenly distributed on the back template, every the hydro-cylinder lid is all installed to mode locking hydro-cylinder afterbody, and is a plurality of first piston rod in the mode locking hydro-cylinder is connected with connector link and connecting plate jointly.

Preferably, the cross-section of oil cylinder lid is the design of the protruding type of falling, the closing plate adopts the metal material to make to be the arch design, the closing plate closely laminates with the corner inner wall of oil cylinder lid.

Preferably, the terminal surface of the oil cylinder cover is provided with a cover plate, the cover plate is provided with a plurality of fixing holes, and the fixing holes are connected with the oil inlet piece oil cylinder cover through screws.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention relates to a direct-pressure type primary-secondary cylinder of an injection molding machine, a mold locking oil cylinder and an oil absorption pressurizing assembly, wherein a first piston rod and a piston in the mold locking oil cylinder reciprocate to generate negative pressure in an oil storage cavity and an oil cylinder cavity, namely, a sealing plate in an oil cylinder cover moves, oil is sucked into the oil cylinder cavity by an oil inlet piece, the sufficient power requirement of the mold locking oil cylinder is ensured, the power of the oil cylinder is greatly improved, and a connecting buckle and a connecting plate which are jointly connected by the piston rods of a plurality of designed mold locking oil cylinders are adopted for arranging the mold locking oil cylinders in a split mode, so that the manufacturing cost is reduced by increasing the number of the mold locking oil cylinders, and meanwhile, the distributed mold locking oil cylinders are arranged, so that the stress points of a mold used by the injection machine are distributed stress, the mold locking force is more balanced under the same condition, the stability of mold locking is ensured, and the structure of the scheme is compact, compared with the traditional direct-pressure injection molding machine, the injection molding machine has the advantages that the occupied space is reduced, and the material cost during the manufacturing of the injection molding machine is reduced.

(2) The invention relates to a direct-pressure primary-secondary cylinder of an injection molding machine, which is provided with a quick die-clamping cylinder, wherein the power is provided by a die-clamping oil cylinder, the speed of pushing a movable die plate is accelerated by the operation of the quick die-clamping cylinder, and meanwhile, the quick die-clamping cylinder is matched with the die-clamping oil cylinder, so that the pushing of the movable die plate is more stable and more accurate, the efficiency of die-clamping operation is greatly improved, the number of oil cylinders is increased, a large oil cylinder piston and a piston rod are avoided, the processing of a large workpiece is avoided, the error is large during the processing of the large workpiece, the precision is not easy to control, the manufacturing cost is high, and the manufacturing difficulty of a large-tonnage direct-pressure injection molding machine is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the mold locking cylinder according to the present invention;

FIG. 3 is a schematic view of a connecting buckle according to the present invention;

FIG. 4 is a schematic view of the structure of the cylinder head according to the present invention;

FIG. 5 is a schematic view of a partial structure of an inner section of the mold locking cylinder according to the present invention;

fig. 6 is a schematic view of the internal cross-sectional structure of the cylinder head according to the present invention.

In the reference symbols: 1. a rear template; 20. an oil cylinder cavity; 21. a mold locking oil cylinder; 22. a first piston rod; 221. a piston; 23. a connecting buckle; 24. a connecting plate; 31. a rapid die closing cylinder; 32. a second piston rod; 4. an oil cylinder cover; 41. an oil inlet piece; 411. opening the cavity; 412. closing the cavity; 42. an oil inlet cavity; 43. a movable post; 44. a closing plate; 45. an oil storage cavity; 46. a high-pressure oil injection port; 5. and (4) moving the template.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-6, the present invention provides a direct-pressure primary-secondary cylinder of an injection molding machine, which comprises: the mold locking device comprises a rear template 1, a mold locking oil cylinder 21 is embedded on the rear template 1, an oil absorption pressurizing assembly is arranged on the mold locking oil cylinder 21, the oil absorption pressurizing assembly comprises an oil cylinder cover 4 arranged at the tail of the mold locking oil cylinder 21, a cover plate is arranged on the end face of the oil cylinder cover 4, a plurality of fixing holes are formed in the cover plate and are connected with the oil inlet part oil cylinder cover 4 through screws, the oil cylinder cover 4 is communicated with the mold locking oil cylinder 21, an oil inlet part 41 is arranged on the oil cylinder cover 4, oil inlet holes distributed in a fan shape are formed in the oil inlet part 41, a movable column 43 matched with the oil inlet part 41 is arranged in the oil inlet part 41, a closing plate 44 is connected to the end face of the movable column 43, an opening cavity 411 and a closing cavity 412 are separated from the movable column 43 in the oil inlet part 41, the closing plate 44 separates the oil cylinder cover 4 into an oil inlet cavity 42 and an oil storage cavity 45, a high-pressure oil inlet 46 is formed in the side wall of the oil cylinder cover 4, specifically, high-pressure oil can be injected again through the high-pressure oil inlet 46, so that the mold locking oil cylinder 21 has sufficient power, an oil cylinder cavity 20 is arranged in the mold locking oil cylinder 21, and the oil cylinder cavity 20 is communicated with the oil storage cavity 45;

a first piston rod 22 is arranged in the oil cylinder cavity 20, the end face of the first piston rod 22 positioned in the oil cylinder cavity 20 is connected with a piston 221, the piston 221 is attached to the inner wall of the oil cylinder cavity 20, the other end of the first piston rod 22 is connected with a connecting buckle 23, the connecting buckle 23 is connected with a connecting plate 24, and the outer wall of the connecting plate 24 is connected with a movable template 5;

two rapid die-closing cylinders 31 are arranged between the rear template 1 and the movable template 5 in an opposite shape, the two rapid die-closing cylinders 31 are respectively installed on the outer wall of the rear template 1 and located on two sides of the die-locking cylinder 21, a second piston rod 32 is arranged in each rapid die-closing cylinder 31, and the end face of each second piston rod 32 is connected with the movable template 5.

In this embodiment, the pressure oil enters the fast mold clamping cylinder 31, the mold cavity of the mold clamping cylinder pushes the piston fast, so that the second piston rod 32 pushes the movable mold plate 5, the movable mold plate 5 drives the first piston rod 22 on the mold clamping cylinder 21 to move, and then the first piston rod 22 in the mold clamping cylinder 3 drives the piston 221 to move, so that negative pressure is generated in the mold cavity 20, a large amount of hydraulic oil moves through the closing plate 44 and the movable column 43 in the cylinder cover 4, oil is sucked into the mold cavity 20 from the oil inlet 41, sufficient power requirement of the mold clamping cylinder 21 is ensured, the oil inlet 41 is closed, the hydraulic oil sucked into the mold clamping action cavity of the mold clamping cylinder 20 is sealed, the pressure oil enters the mold clamping action cavity of the mold clamping cylinder 21 through the oil storage cavity 35 of the cylinder cover, the pressure in the mold clamping action cavity is pressurized, so as to complete the mold clamping action function of the injection molding machine with large mold clamping force, hydraulic oil in a mode locking action cavity of the mode locking oil cylinder 20 is decompressed through an oil inlet cavity 42 of the oil cylinder cover 4, after decompression is completed, the oil inlet and outlet device of the oil cylinder cover 4 is opened, pressure oil enters a mode opening function cavity of the rapid mode closing cylinder 31 to rapidly push the movable template 5 to return, the movable template 31 drives a piston rod of the mode locking oil cylinder 21, then the piston 221 is driven through the first piston rod 22 of the mode locking oil cylinder 21, large-flow hydraulic oil in the mode locking action cavity of the mode locking oil cylinder 21 is discharged through the cavity of the oil cylinder cover 4, and die opening is completed.

Further, mode locking hydro-cylinder 21 is equipped with a plurality ofly, and is concrete, and a plurality of mode locking hydro-cylinder 21 can be two or more, and a plurality of mode locking hydro-cylinder 21 evenly distributed are on back template 1, and hydro-cylinder lid 4 is all installed to every mode locking hydro-cylinder 21 afterbody, and the first piston rod 22 in a plurality of mode locking hydro-cylinders 21 is connected with connector link 23 and connecting plate 24 jointly.

In the present embodiment, the plurality of mold locking cylinders 21 are provided to provide sufficient power for the mold locking operation, and the plurality of mold locking cylinders 21 can be assembled according to actual requirements.

Further, the section of the oil cylinder cover 4 is of an inverted convex design, the closing plate 44 is made of metal and is of an arch design, and the closing plate 44 is tightly attached to the inner walls of the corners of the oil cylinder cover 4.

In the present embodiment, the suction and discharge of the hydraulic oil by the closing plate 44 can be controlled by the negative pressure.

Specifically, the working principle and the using process of the invention are as follows: pressure oil enters the quick die-clamping cylinder 31, a die cavity of the die-clamping cylinder quickly pushes a piston, so that a second piston rod 32 pushes a movable die plate 5, the movable die plate 5 drives a first piston rod 22 on a die-clamping oil cylinder 21 to move, then the first piston rod 22 in the die-clamping oil cylinder 3 drives a piston 221 to move, negative pressure is generated in the die cavity 20 of the oil cylinder, large-flow hydraulic oil moves through a closing plate 44 and a movable column 43 in an oil cylinder cover 4, the oil is sucked into the die cavity 20 of the oil cylinder by an oil inlet piece 41, sufficient power requirement of the die-clamping oil cylinder 21 is ensured, the oil inlet piece 41 is closed, the hydraulic oil sucked into the die-clamping action die cavity of the die-clamping oil cylinder 20 is closed, the pressure oil enters the die-clamping action die cavity of the die-clamping oil cylinder 21 through an oil storage die cavity 35 of the oil cylinder cover, the pressure in the die cavity is pressurized, the die-clamping action function of the injection molding machine is completed by large die-clamping force, the pressure in the die-clamping action die cavity of the oil cylinder 20 is released through the oil inlet die cavity 42 of the oil cylinder cover 4, after pressure relief is completed, the oil inlet and outlet device of the oil cylinder cover 4 is opened, pressure oil enters the mold opening function cavity of the quick mold closing cylinder 31 to quickly push the movable mold plate 5 to return, the movable mold plate 31 drives the piston rod of the mold locking cylinder 21, and then the piston 221 is driven by the first piston rod 22 of the mold locking cylinder 21, so that large-flow hydraulic oil in the mold opening function cavity of the mold locking cylinder 21 is discharged through the cavity of the oil cylinder cover 4, and mold opening is completed until a whole working sequence is completed.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The direct-pressure primary-secondary cylinder of the injection molding machine is characterized by comprising a rear template (1), a mold locking oil cylinder (21) is embedded in the rear template (1), an oil absorption pressurizing assembly is arranged on the mold locking oil cylinder (21), the oil absorption pressurizing assembly comprises an oil cylinder cover (4) arranged at the tail of the mold locking oil cylinder (21), the oil cylinder cover (4) is communicated with the mold locking oil cylinder (21), an oil inlet piece (41) is arranged on the oil cylinder cover (4), a movable column (43) matched with the oil inlet piece (41) is arranged in the oil inlet piece (41), the end face of the movable column (43) is connected with a closing plate (44), the movable column (43) in the oil inlet piece (41) is divided into an opening cavity (411) and a closing cavity (412), oil inlet holes distributed in a fan-shaped manner are formed in the oil inlet piece (41), and the oil inlet cavity (42) and an oil storage cavity (45) are divided from the oil cylinder cover (4) by the closing plate (44), the side wall of the oil cylinder cover (4) is provided with a high-pressure oil injection port (46), an oil cylinder cavity (20) is arranged in the mold locking oil cylinder (21), and the oil cylinder cavity (20) is communicated with an oil storage cavity (45);

a first piston rod (22) is arranged in the oil cylinder cavity (20), the end face of the first piston rod (22) positioned in the oil cylinder cavity (20) is connected with a piston (221), the piston (221) is attached to the inner wall of the oil cylinder cavity (20), the other end of the first piston rod (22) is connected with a connecting buckle (23), the connecting buckle (23) is connected with a connecting plate (24), and the outer wall of the connecting plate (24) is connected with a movable mould plate (5);

be two relative form quick mould clamping cylinder (31) between back template (1) and movable mould board (5), two quick mould clamping cylinder (31) are installed respectively on the outer wall of back template (1) to be located the both sides of mode locking hydro-cylinder (21), be equipped with second piston rod (32) in quick mould clamping cylinder (31), the terminal surface of second piston rod (32) is connected with movable mould board (5).

2. The direct-pressing type primary-secondary cylinder of the injection molding machine according to claim 1, wherein: mode locking hydro-cylinder (21) are equipped with a plurality ofly, and a plurality of mode locking hydro-cylinder (21) evenly distributed on back template (1), every hydro-cylinder lid (4) are all installed to mode locking hydro-cylinder (21) afterbody, and a plurality of first piston rod (22) in mode locking hydro-cylinder (21) are connected with connector link (23) and connecting plate (24) jointly.

3. The direct-pressing type primary-secondary cylinder of the injection molding machine according to claim 1, wherein: the cross-section of oil cylinder lid (4) is the design of the protruding type of falling, closing plate (44) adopt the metal material to make to be the arch design, closing plate (44) and the corner inner wall of oil cylinder lid (4) closely laminate.

4. The direct-pressing type primary-secondary cylinder of the injection molding machine according to claim 1, wherein: the terminal surface of hydro-cylinder lid (4) is equipped with the apron, be equipped with a plurality of fixed orificess on the apron, just the fixed orifices is connected with oil feed spare hydro-cylinder lid (4) through the screw.