CN110561697A

CN110561697A - Vertical injection molding machine

Info

Publication number: CN110561697A
Application number: CN201911017351.2A
Authority: CN
Inventors: 姚艺
Original assignee: Hunan Hongjun Electronic Technology Co Ltd
Current assignee: Hunan Hongjun Electronic Technology Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2019-12-13

Abstract

the invention discloses a vertical injection molding machine, which comprises a rack, an injection assembly, a hydraulic transmission assembly and a die assembly, wherein the rack is provided with a guide rail; the die assembly component comprises a lower base, a lower fixed die, a lower movable die, a middle base, an upper fixed die, an upper base and an upper movable die; the hydraulic transmission assembly comprises a lower hydraulic rod and an upper hydraulic rod; the lower hydraulic rod is connected between the middle base and the top surface of the rack; the upper hydraulic rod is connected between the upper base and the middle base; when the middle base moves to the lowest part, the lower movable mould is in contact with the lower fixed mould to form a lower mould space; when the upper base moves to the lowest part, the upper movable mould and the upper fixed mould are in contact with each other to form an upper mould space; when the injection molding machine is used, the upper and lower 2 molds can be simultaneously subjected to die assembly and injection molding in one-step stamping process; the number of the DC connectors which can be formed in one stamping step is greatly increased, and the production efficiency is improved.

Description

Vertical injection molding machine

Technical Field

The invention relates to an electronic product production apparatus, in particular to a vertical injection molding machine.

Background

The existing power line of electronic products still uses a DC connector for a considerable part, and during the production process of the DC line, the connector and the power line are welded and connected, and then the welded point is subjected to injection molding and wrapping molding, which is usually completed by an injection molding machine and a corresponding mold.

The injection molding machine used in the production process is generally a screw injection molding machine; the working principle of the screw injection molding machine is that firstly, plastic particles are placed into a storage barrel and then enter a feeding barrel from the storage barrel, a screw is arranged in the feeding barrel, and the plastic particles become a flowing plastic solution under the heating action after entering the feeding barrel; after the mold moving seat is combined with the mold fixing seat, the screw rotates to push the plastic solution in the feeding cylinder forwards and press the plastic solution into the mold empty groove through the injection nozzle; and under certain pressure and cooling action, the plastic solution is shaped in the mold, and then the injection molding of the DC wire joint can be completed.

but the existing injection molding machine can only punch one die at a time, and the production efficiency is restricted.

Disclosure of Invention

The invention mainly aims to provide a vertical injection molding machine, and aims to solve the problem that the production efficiency is limited because only one die can be punched at one time by the conventional injection molding machine.

in order to achieve the purpose, the technical scheme provided by the invention is as follows:

A vertical injection molding machine comprises a rack, an injection assembly, a hydraulic transmission assembly and a mold closing assembly; the die assembly component comprises a lower base, a lower fixed die, a lower movable die, a middle base, an upper fixed die, an upper base and an upper movable die;

The lower base is fixed on the top surface of the rack; the lower fixed die is connected to the top of the lower base; the lower movable mould is connected to the bottom of the middle base, and the upper fixed mould is connected to the top of the middle base; the lower movable mould is positioned right above the lower fixed mould; the upper movable mould is connected to the bottom of the upper base; the upper movable mould is positioned right above the upper fixed mould;

The hydraulic transmission assembly comprises a lower hydraulic rod and an upper hydraulic rod; the lower hydraulic rod is connected between the middle base and the top surface of the rack; the upper hydraulic rod is connected between the upper base and the middle base;

The lower hydraulic rod and the upper hydraulic rod are both vertically arranged; the lower base, the middle base and the upper base are all horizontally arranged; die grooves are formed in the top of the lower fixed die, the bottom of the lower fixed die, the top of the upper fixed die and the bottom of the upper movable die;

a lower solution channel is formed in the lower movable die; the lower solution channel is communicated with the die groove of the lower movable die; an upper solution channel is formed in the upper movable die; the upper solution channel is communicated with the die groove of the upper movable die;

When the middle base moves to the lowest part, the lower movable mould is in contact with the lower fixed mould in a fitting manner to form a lower mould space; when the upper base moves to the lowest part, the upper movable mould is in contact with the upper fixed mould to form an upper mould space;

The injection assembly comprises a storage barrel, a first conveying pipe, a first feeding barrel, a second conveying pipe and a second feeding barrel; the material storage cylinder is fixedly connected to the upper base; the first conveying pipe and the second conveying pipe are communicated with the lower part of the material storage cylinder; the first conveying pipe is communicated with one end of the first feeding cylinder; the first feeding cylinder vertically penetrates through the upper base; the other end of the first feeding cylinder is provided with a first nozzle; the first nozzle is communicated with the upper solution channel;

the second conveying pipe is communicated with one end of the second feeding cylinder; the second feeding cylinder horizontally penetrates through the middle base; the other end of the second feeding cylinder is provided with a second nozzle; the second nozzle is communicated with the lower solution channel; the second conveying pipe is a hose.

Preferably, the top projections of the middle base and the upper base are rectangular; the number of the lower hydraulic rods is 4; the 4 lower hydraulic rods are connected to the four corners of the bottom of the middle base;

The number of the upper hydraulic rods is 4; the 4 upper hydraulic rods are connected to the four corners of the bottom of the upper base.

preferably, the vertical injection molding machine further comprises a cooling assembly; the cooling assembly comprises a water inlet pipe, a water outlet pipe, a circulating water pump and a cooling fan;

Cooling water channels are formed in the lower fixed die, the lower movable die, the upper fixed die and the upper movable die; the inlet end of the cooling water channel is communicated with the water inlet pipe; the outlet end of the cooling water channel is communicated with the water outlet pipe; the circulating pipe is communicated between the water inlet pipe and the water outlet pipe; the circulating water pump is communicated between the circulating pipe and the water inlet pipe;

the circulating pipe is arranged on the rear wall of the rack in parallel; the circulating pipe is in a reciprocating shape; the heat radiation fan is arranged between the circulating pipe and the rear wall of the rack; a preset distance is kept between the heat dissipation fan and the rear wall of the rack.

Preferably, the water inlet pipe and the water outlet pipe are both flexible pipes; the circulating pipe is a metal pipe.

Preferably, the vertical injection molding machine includes a locking assembly; the locking assembly comprises a locking frame and a locking hydraulic rod;

The locking frame comprises a vertical rod and a cross rod; the number of the vertical rods is 2; the 2 vertical rods are vertically and fixedly connected to the top surface of the rack; the top of each of the 2 vertical rods is connected with the cross rod; the cross bar is parallel to the top surface of the rack; the cross rod is positioned right above the upper base; the locking hydraulic rod is connected and arranged between the cross rod and the upper base.

preferably, the vertical injection molding machine comprises a positioning assembly; the positioning assembly comprises a positioning rod; the middle base is provided with a middle positioning hole; the upper base is provided with an upper positioning hole; the positioning rod is vertically arranged and slidably penetrates through the middle positioning hole and the upper positioning hole;

The top of the positioning rod is fixedly connected with the cross rod; the bottom of the positioning rod is fixedly connected to the top surface of the rack.

Preferably, the positioning assembly further comprises a first positioning groove arranged on the lower fixed die, a first positioning pin arranged on the lower movable die, a second positioning groove arranged on the upper fixed die and a second positioning pin arranged on the upper movable die;

When the lower movable die and the lower fixed die are attached, the first positioning groove and the first positioning pin are nested in a matched mode; when the upper movable mould is attached to the upper fixed mould, the second positioning groove and the second positioning pin are matched and nested.

Preferably, the number of the first positioning grooves, the number of the first positioning pins, the number of the second positioning grooves and the number of the second positioning pins are all 3; the first positioning grooves correspond to the first positioning pins one to one; the second positioning grooves correspond to the second positioning pins one to one;

When the lower movable die and the lower fixed die are attached, each first positioning groove is nested with the corresponding first positioning pin in a matched mode; when the upper movable mould is attached to the upper fixed mould, each second positioning groove is matched and nested with the corresponding second positioning pin.

Preferably, the vertical injection molding machine comprises a control assembly; the control assembly comprises a mold closing switch and an injection switch; the upper hydraulic rod, the lower hydraulic rod and the locking hydraulic rod are in control connection with the die closing switch;

A first screw is arranged in the first feeding cylinder; a second screw is arranged in the second feeding cylinder; the first screw rod and the second screw rod are in control connection with the injection switch.

Preferably, the upper hydraulic rod is connected between the upper base and the top surface of the rack.

Compared with the prior art, the invention at least has the following beneficial effects:

the method comprises the following steps of arranging a lower fixed die, a lower movable die, an upper fixed die and an upper movable die; when the injection molding machine is used, the upper and lower 2 molds can be simultaneously subjected to die assembly and injection molding in one-step stamping process; the number of the DC connectors which can be formed in one stamping step is greatly increased, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a vertical injection molding machine according to an embodiment of the present invention;

FIG. 2 is a schematic front view of a vertical injection molding machine according to an embodiment of the present invention;

FIG. 3 is a schematic side view of a vertical injection molding machine according to an embodiment of the present invention;

Fig. 4 is a schematic front view of a vertical injection molding machine according to another embodiment of the present invention.

The reference numbers illustrate:

Reference numerals	Name (R)	reference numerals	Name (R)
				100	Rack	450	Second positioning pin
210	lower base	460	first positioning pin
				220	Lower fixing die	470	second positioning groove
230	Middle base	480	A first positioning groove
				240	Lower movable mould	510	storage cylinder
250	Upper fixing die	520	first delivery pipe
				260	Upper base	530	Second delivery pipe
270	Upper movable mould	540	first feeding cylinder
				310	Upper hydraulic rod	550	Second feeding cylinder
320	lower hydraulic rod	610	Water inlet pipe
				410	Vertical rod	620	Water outlet pipe
420	cross bar	630	Circulation pipe
				430	Locking hydraulic rod	640	Heat radiation fan
440	Positioning rod	650	Circulating water pump
				441	Upper positioning hole	700	Die groove
442	middle positioning hole

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

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.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

in addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a vertical injection molding machine.

Referring to fig. 1-3, an embodiment of a vertical injection molding machine includes a gantry 100, an injection assembly, a hydraulic drive assembly, and a clamp assembly; the clamping assembly includes a lower base 210, a lower stationary mold 220, a lower movable mold 240, a middle base 230, an upper stationary mold 250, an upper base 260, and an upper movable mold 270.

the lower base 210 is fixed to the top surface of the stage 100; the lower stationary mold 220 is coupled to the top of the lower base 210; the lower movable mold 240 is attached to the bottom of the middle base 230, and the upper fixed mold 250 is attached to the top of the middle base 230; the lower movable mold 240 is positioned right above the lower fixed mold 220; the upper movable mold 270 is attached to the bottom of the upper base 260; the upper movable mold 270 is positioned directly above the upper stationary mold 250.

the hydraulic transmission assembly comprises a lower hydraulic rod 320 and an upper hydraulic rod 310; the lower hydraulic rod 320 is connected between the middle base 230 and the top surface of the stand 100; an upper hydraulic ram 310 is connected between the upper base 260 and the middle base 230.

The lower hydraulic rod 320 and the upper hydraulic rod 310 are both vertically arranged; the lower base 210, the middle base 230 and the upper base 260 are all horizontally arranged; the top of the lower fixed mold 220, the bottom of the lower fixed mold 220, the top of the upper fixed mold 250 and the bottom of the upper movable mold 270 are all provided with mold grooves 700.

A lower solution passage (not shown) is opened inside the lower movable mold 240; the lower solution passage communicates with the mold groove 700 of the lower movable mold 240; an upper solution channel (not shown) is formed inside the upper movable mold 270; the upper solution passage communicates with the mold groove 700 of the upper movable mold 270.

when the middle base 230 moves to the lowermost side, the lower movable mold 240 and the lower fixed mold 220 come into close contact and form a lower mold space (not shown); when the upper base 260 moves to the lowermost position, the upper movable mold 270 and the upper stationary mold 250 come into close contact and form an upper mold space (not shown).

The injection assembly comprises a storage barrel 510, a first delivery pipe 520, a first feed barrel 540, a second delivery pipe 530 and a second feed barrel 550; the storage cylinder 510 is fixedly connected to the upper base 260; a first conveying pipe 520 and a second conveying pipe 530 are communicated below the material storage cylinder 510; the first conveying pipe 520 is communicated with one end of the first feeding cylinder 540; the first feeding cylinder 540 vertically penetrates through the upper base 260; the other end of the first feed cylinder 540 is provided with a first nozzle (not shown); the first nozzle is communicated with the upper solution channel.

The second conveying pipe 530 is communicated with one end of the second feeding cylinder 550; the second feeding cylinder 550 horizontally penetrates through the middle base 230; the other end of the second feed cylinder 550 is provided with a second nozzle (not shown); the second nozzle is communicated with the lower solution channel; the second transfer pipe 530 is a hose.

The working principle is as follows: the storage barrel 510 is used for placing plastic particles, the plastic particles are conveyed to the first feeding barrel 540 through the first conveying pipe 520, and the plastic particles are conveyed to the second feeding barrel 550 through the second conveying pipe 530; the first feeding cylinder 540 and the second feeding cylinder 550 are wrapped with a heating device (usually heating with a resistance wire), and the plastic particles are melted by the heating device to become a plastic solution; when the die is closed, the plastic solution enters the upper die space through the upper solution channel, and the plastic solution enters the lower die space through the lower solution channel; the technical characteristics are the conventional arrangement of the screw injection molding machine, and the details are not repeated.

By providing the lower fixed mold 220, the lower movable mold 240, the upper fixed mold 250, and the upper movable mold 270; when the injection molding machine is used, the upper and lower 2 molds can be simultaneously subjected to die assembly and injection molding in one-step stamping process; the number of the DC connectors which can be formed in one stamping step is greatly increased, and the production efficiency is improved.

In addition, the top projections of the middle base 230 and the upper base 260 are rectangular; the number of the lower hydraulic rods 320 is 4; the 4 lower hydraulic rods 320 are connected to the four corners of the bottom of the middle base 230.

The number of the upper hydraulic rods 310 is 4; the 4 upper hydraulic rods 310 are connected to four corners of the base of the upper base 260. Through the technical scheme, the vertical movement of the middle base 230 and the upper base 260 is more stable and smooth.

in addition, the vertical injection molding machine provided by the embodiment further comprises a cooling assembly; the cooling module includes a water inlet pipe 610, a water outlet pipe 620, a circulation pipe 630, a circulation water pump 650, and a cooling fan 640.

Cooling water channels (not shown) are formed inside the lower fixed mold 220, the lower movable mold 240, the upper fixed mold 250 and the upper movable mold 270; the inlet end of the cooling water channel is communicated with a water inlet pipe 610; the outlet end of the cooling water channel is communicated with a water outlet pipe 620; a circulating pipe 630 is communicated between the water inlet pipe 610 and the water outlet pipe 620; a circulating water pump 650 is communicated between the circulating pipe 630 and the water inlet pipe 610.

the circulation duct 630 is disposed in parallel to the rear wall of the stage 100; the circulation pipe 630 is in a reciprocating shape; a heat radiating fan 640 is provided between the circulation duct 630 and the rear wall of the stage 100; a predetermined distance (preferably 5cm in the present embodiment) is maintained between the heat dissipation fan 640 and the rear wall of the rack 100, and the predetermined distance is maintained to ensure the normal operation of the heat dissipation fan.

Through the technical scheme, when the mold is closed, the plastic solution in the upper mold space and the lower mold space can be rapidly cooled, the cooling forming time of the plastic solution is shortened, and therefore the closing time is shortened, and the production efficiency is improved.

Meanwhile, the water inlet pipe 610 and the water outlet pipe 620 are flexible pipes, so that the movement of the middle base 230 and the upper base 260 is facilitated; the circulation pipe 630 is a metal pipe to improve a heat dissipation effect.

In addition, the vertical injection molding machine proposed in the present embodiment includes a locking assembly; the locking assembly includes a locking bracket and a locking hydraulic lever 430.

the locking frame comprises a vertical rod 410 and a cross rod 420; the number of the vertical rods 410 is 2; the 2 vertical rods 410 are vertically and fixedly connected to the top surface of the rack 100; the top of 2 vertical rods 410 is connected with a cross rod 420; the crossbar 420 is parallel to the top surface of the gantry 100; the cross bar 420 is positioned right above the upper base 260, and the top view projection of the cross bar 420 is positioned in the middle of the upper base 260; a locking hydraulic rod 430 is connected between the cross rod 420 and the upper base 260.

Through above-mentioned technical scheme, can carry out pressure locking simultaneously to the bed die when the compound die and last mould, prevent the condition of plastic solution from the upper die space or the seepage in the bed die space, guarantee the production success rate.

Meanwhile, the vertical injection molding machine provided by the embodiment further comprises a positioning assembly; the positioning assembly comprises a positioning rod 440; the middle base 230 is provided with a middle positioning hole 442; the upper base 260 is provided with an upper positioning hole 441; the positioning rod 440 is vertically disposed and slidably disposed through the middle positioning hole 442 and the upper positioning hole 441.

the top of the positioning rod 440 is fixedly connected to the cross rod 420; the bottom of the positioning rod 440 is fixedly attached to the top surface of the gantry 100. Through above-mentioned technical scheme, the base 230 and the accurate nature of last base 260 when vertical removal in the assurance to go up movable mould 270 and last fixed die 250 and lower movable mould 240 and the accurate agree with of lower fixed die 220 when guaranteeing the compound die, make injection moulding's product of higher quality.

Meanwhile, the positioning assembly further includes a first positioning groove 480 formed in the lower fixed mold 220, a first positioning pin 460 formed in the lower movable mold 240, a second positioning groove 470 formed in the upper fixed mold 250, and a second positioning pin 450 formed in the upper movable mold 270.

When the lower movable mold 240 and the lower fixed mold 220 are attached, the first positioning groove 480 and the first positioning pin 460 are nested in a matching manner; when the upper movable mold 270 and the upper stationary mold 250 are fitted, the second positioning groove 470 and the second positioning pin 450 are fitted and nested.

Through the technical scheme, the matching precision between the upper movable die 270 and the upper fixed die 250 and between the lower movable die 240 and the lower fixed die 220 is further ensured.

In addition, the number of the first positioning grooves 480, the first positioning pins 460, the second positioning grooves 470 and the second positioning pins 450 is 3; the first positioning grooves 480 correspond to the first positioning pins 460 one to one; the second positioning grooves 470 correspond to the second positioning pins 450 one to one.

When the lower movable mold 240 and the lower fixed mold 220 are attached, each first positioning groove 480 and the corresponding first positioning pin 460 are nested in a matching manner; when the upper movable mold 270 and the upper fixed mold 250 are fitted, each second positioning groove 470 and the corresponding second positioning pin 450 are fitted and nested.

3 locating pins and locating grooves, compared with 1 or 2, enable the upper movable mold 270 and the upper fixed mold 250 and the lower movable mold 240 and the lower fixed mold 220 to have better matching precision.

In addition, the invention provides a vertical injection molding machine, which comprises a control component; the control assembly includes a clamp switch (not shown) and an injection switch (not shown); the upper hydraulic rod 310, the lower hydraulic rod 320 and the locking hydraulic rod 430 are in control connection with the mold closing switch.

A first screw (not shown) is arranged inside the first feeding cylinder 540; a second screw (not shown) is arranged in the second feeding cylinder 550, the arrangement of the screw in the feeding cylinder is a conventional technology adopted by the existing screw injection molding machine, the plastic solution in the first feeding cylinder 540 is pushed into the upper solution channel by the thrust generated by the rotation of the first screw, and the plastic solution in the second feeding cylinder 550 is pushed into the lower solution channel by the thrust generated by the rotation of the second screw so as to complete injection molding, which is not described again; the first screw rod and the second screw rod are both in control connection with the injection switch.

Through the technical scheme, the vertical injection molding machine can be more conveniently produced and operated by operators. The method specifically comprises the following steps: when the mold is opened, the welded DC connector is firstly placed into the mold groove 700 of the lower fixed mold 220 and the mold groove 700 of the upper fixed mold 250; then, a mold closing switch is turned on, the upper hydraulic rod 310 and the lower hydraulic rod 320 are simultaneously shortened, and the locking hydraulic rod 430 is extended, so that the lower movable mold 240 and the lower fixed mold 220 are closed, and the upper movable mold 270 and the upper fixed mold 250 are closed; at this time, the locking hydraulic rod 430 maintains the clamping pressure of the upper and lower molds by pressing the upper base 260; then, an injection switch is turned on, the plastic solution is pushed into the upper die space and the lower die space to complete injection molding, and then the injection switch is turned off; after a certain time, closing the mold closing switch, simultaneously extending the upper hydraulic rod 310 and the lower hydraulic rod 320, and shortening the locking hydraulic rod 430, so that the lower movable mold 240 is separated from the lower fixed mold 220, and the upper movable mold 270 is separated from the upper fixed mold 250; and taking out the DC connector after the injection molding is finished, and finishing a complete injection molding process.

In another embodiment of the vertical injection molding of the present invention, as shown in fig. 4, an upper hydraulic rod 310 is connected between the upper base 260 and the top surface of the stand 100. In addition, other technical features are consistent with the previous embodiment; through the technical scheme of the embodiment, the upper hydraulic rod 310 is connected to the rack 100 and the upper base 260, so that the vertical movement of the upper base 260 is more stable.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A vertical injection molding machine comprises a rack, an injection assembly, a hydraulic transmission assembly and a mold closing assembly; the device is characterized in that the die assembly component comprises a lower base, a lower fixed die, a lower movable die, a middle base, an upper fixed die, an upper base and an upper movable die;

2. The vertical injection molding machine of claim 1, wherein the top view projections of the middle base and the upper base are both rectangular; the number of the lower hydraulic rods is 4; the 4 lower hydraulic rods are connected to the four corners of the bottom of the middle base;

3. The vertical injection molding machine of claim 1, further comprising a cooling assembly; the cooling assembly comprises a water inlet pipe, a water outlet pipe, a circulating water pump and a cooling fan;

4. the vertical injection molding machine of claim 3, wherein the water inlet pipe and the water outlet pipe are both hoses; the circulating pipe is a metal pipe.

5. The vertical injection molding machine of claim 1, comprising a locking assembly; the locking assembly comprises a locking frame and a locking hydraulic rod;

6. the vertical injection molding machine of claim 5, comprising a positioning assembly; the positioning assembly comprises a positioning rod; the middle base is provided with a middle positioning hole; the upper base is provided with an upper positioning hole; the positioning rod is vertically arranged and slidably penetrates through the middle positioning hole and the upper positioning hole;

7. the vertical injection molding machine according to claim 6, wherein the positioning assembly further comprises a first positioning groove provided in the lower stationary mold, a first positioning pin provided in the lower movable mold, a second positioning groove provided in the upper stationary mold, and a second positioning pin provided in the upper movable mold;

8. The vertical injection molding machine according to claim 7, wherein the number of the first positioning grooves, the first positioning pins, the second positioning grooves, and the second positioning pins is 3; the first positioning grooves correspond to the first positioning pins one to one; the second positioning grooves correspond to the second positioning pins one to one;

9. The vertical injection molding machine of claim 1, comprising a control assembly; the control assembly comprises a mold closing switch and an injection switch; the upper hydraulic rod, the lower hydraulic rod and the locking hydraulic rod are in control connection with the die closing switch;

10. the vertical injection molding machine as claimed in any one of claims 1 to 9, wherein the upper hydraulic rod is connected between the upper base and the top surface of the stand.