CN211917506U - Vertical injection molding machine with single nozzle and double clamping - Google Patents

Abstract

The utility model relates to a vertical injection molding machine with a single nozzle and double mold locking. Two adjacent movable mold plates are mainly arranged between the upper and lower fixed mold plates of the machine platform. The two movable mold plates are connected to form a mold locking mechanism, and an injection mechanism containing a pressure holding device is arranged on one side of the lower fixed mold plate. A shared fixed mold is installed on the lower fixed mold plate. The shared fixed mold is respectively used for two movable molds on the two movable mold plates to be locked and closed. A diversion channel is arranged on the shared fixed mold and is respectively connected to two groups of mold cavities of the shared fixed mold. A control valve needle is arranged on the channel leading to any group of mold cavities. The injection mechanism is used to divert the injection to one of the molds for filling, pressure holding and cooling. At the same time, the ejected control valve needle is used to cool, store materials, open and close the mold corresponding to the other mold. The single nozzle and the double mold locking are exchanged to perform filling and pressure holding according to the circulation principle, which can achieve energy saving and cost reduction effects through continuous manufacturing.

Description

Vertical injection molding machine with single nozzle and double clamping

technical field

The utility model relates to a vertical injection molding machine with single injection nozzle and double mold locking, in particular to a mechanism used on the vertical injection molding machine to increase production capacity, which mainly utilizes the mutual exchange of single injection nozzle and dual mold clamping. Two staggered cyclic actions are performed to achieve a single-shot nozzle and double-clamping injection molding machine structure that can be continuously manufactured and has energy saving and cost reduction.

Background technique

In a conventional injection molding machine currently used, a granular thermoplastic resin as a raw material is fed into a barrel, and the resin is melted by a rotatable and advanced screw provided in the barrel, while the resin is melted. The melt is sent to the nozzle at the front end of the screw, and the melt is injected into the mold from the nozzle provided at the front end of the screw. The molded product of the mold is moved out of the movable mold, thereby forming the product.

For the detailed action principle of the above single-mode injection molding machine, in order to start driving the clamping cylinder on the machine table, push the movable template to close the male and female molds, and continue to drive the rotating screw to feed by the motor, and the plastic is removed from the heated material. The barrel is transformed into a flowing state (plasticization, material storage), and the melt flowing in the direction of the nozzle generates a reaction force during the guide, so that the screw retreats to the set material storage position. After that, the screw is pushed by the piston rod of the injection hydraulic cylinder, and the melt stored in the barrel is extruded into the mold through the nozzle filler. The template is withdrawn to form an open mold and eject the solidified product in the mold.

However, during the injection process of the plastic injection molding machine, the granular plastic is rotated and pushed by the hopper through the feeding screw, and heated by the electric heating sheet outside the barrel to be converted into melting. The melting is a phenomenon of thermal expansion. Therefore, when the melt injection fills the mold, it must continue to be replenished. Filling to prevent the shape of the product from being slumped and deformed after cooling and shrinking, and this filling action is the so-called "pressure holding". When the injection molding machine includes a pressure-holding device, the pressure-holding device will be installed between the barrel and the nozzle, so that while the pressure is maintained to the front nozzle, the rear screw can be rotated and plasticized, so as to achieve the overlapping of the pressure-holding and plasticizing actions. The effect of reducing cycle time. A pressure holding device is optional if it has little effect on the cycle. It can be omitted when producing products with wall thickness less than 4mm.

It can be seen from the above that the larger the wall thickness of the product made by the single-mode injection molding machine of the prior art, the longer the pressure holding and cooling time; relatively, the production speed of the product will be slower, the production capacity will be reduced, And increase the manufacturing cost, which is not in line with economic benefits, and needs to be improved.

Therefore, in view of this, the inventor, adhering to the rich experience in design, development and actual production for many years in the related industry, researches and improves the existing structure and defects, and provides a vertical injection molding machine with single nozzle and double clamping, in order to To achieve the purpose of better practical value.

Utility model content

The main purpose of the utility model is to provide a vertical injection molding machine with single injection nozzle and double mold clamping, especially a mechanism applied to the vertical injection molding machine to increase production capacity, which mainly uses single injection nozzle, dual injection molding machine The mold clamping is exchanged for staggered cyclic action to achieve the purpose of the injection molding machine structure of single injection nozzle and double mold clamping that can be continuously manufactured and has energy saving and cost reduction.

The main purpose and effect of the vertical injection molding machine with single nozzle and double clamping of the present utility model are achieved by the following specific technical means:

The utility model proposes a vertical injection molding machine with single injection nozzle and double mold clamping. An upper fixed template and a lower fixed template are arranged on the machine table of the injection molding machine, and an injection mechanism is arranged on the other side of the lower fixed template. The injection mechanism is provided with an injection nozzle with a pressure maintaining device, wherein,

The end face of the lower fixed template is provided with a shared fixed mold, and the shared fixed mold is provided with a material injection hole corresponding to the injection nozzle of the injection mechanism, and the injection nozzle is correspondingly installed on the lower fixed template to share the fixed mold. The injection hole of the plate performs the injection action. The shared fixed mold includes a first group of mold cavities and a second group of mold cavities, and the first group of mold cavities and the second group of mold cavities are respectively provided with a first group of mold cavities. The feed channel and the second feed channel, in the shared fixed mold, are provided with a shunt channel that communicates with the corresponding injection holes, and two ends of the shunt channel are respectively provided with a second channel connected to the first group of mold cavities. A feeding channel, a second feeding channel of the second group of mold cavities, and a first control valve needle, a second control valve needle and a second control valve are arranged at the two ends of the shunt channel corresponding to the first feeding channel and the second feeding channel. a valve needle, the first control valve needle and the second control valve needle are used to control the flow distribution channel to communicate or block the flow with the first group of mold cavities and the second group of mold cavities;

A first movable template and a second movable template that are adjacently arranged and capable of relative movable displacement are arranged between the upper fixed template and the lower fixed template, and the first movable template corresponds to the first group of the shared fixed templates. The mold cavity is provided with a first movable mold, and the second movable mold plate is provided with a second movable mold corresponding to the second group of mold cavities of the shared fixed mold, and the first movable mold plate and the second movable mold plate are respectively The connecting group is provided with a first clamping mechanism and a second clamping mechanism, and the first clamping mechanism and the second clamping mechanism respectively drive the first movable mold and the second movable mold of the first movable template. The second movable mold is mold-locked or mold-opened relative to the shared fixed mold of the lower fixed template.

It is mainly provided with two movable templates adjacent to the left and right between the upper fixed template and the lower fixed template on the machine table. An injection mechanism with a pressure-maintaining device is included, and a shared fixed mold is installed on the lower fixed mold plate. The shared fixed mold is respectively used for the two movable molds on the two movable mold plates to be closed and closed, and a split material is arranged on the shared fixed mold. The distribution channel is respectively connected to the two groups of mold cavities of the shared fixed mold, and a control valve needle is arranged on the channel leading to each group of mold cavities; the single injection nozzle of the injection mechanism is used to divide the flow to one of the two groups of mold cavities. The mold is filled, pressure-maintained and cooled, and at the same time, the ejection control valve is used to cool, store, and open and close the mold (including ejection) for the other mold. The cycle principle of filling and pressure-holding by mutual exchange of mold clamping enables its continuous manufacturing to achieve high-efficiency output effects of energy saving and cost reduction.

A preferred embodiment of the vertical injection molding machine with single injection nozzle and double mold clamping of the present invention, wherein the first control valve needle and the second control valve needle are respectively controlled by an oil pressure mechanism.

By the above, the composition of the structure of the present utility model and the description of the use and implementation can be seen that the present utility model has the following advantages compared with the existing structure:

1. The vertical injection molding machine with single injection nozzle and double mold clamping of the present utility model can continue to carry out the cooling, material storage, mold opening and closing (including ejection) of another group of mold clamping mechanisms by using the filling, pressure holding and cooling time. process, in order to save time, improve production efficiency, and reduce production equipment costs.

2. The vertical injection molding machine with single injection nozzle and double clamping of the present utility model can control the power required in the process of material storage and injection filling by using the main power source, while the process of maintaining pressure at a slow speed and a long time uses a small power source. Power source control, in this way, reduces the load time of the main power source and achieves the effect of saving a lot of energy.

Description of drawings

The drawings described herein are for explanatory purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportions of the components in the figures are only schematic and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportions of the components of the present invention. Under the teaching of the present invention, those skilled in the art can select various possible shapes and proportions according to specific conditions to implement the present invention.

Fig. 1 is the three-dimensional appearance schematic diagram of the utility model;

Fig. 2 is the side view schematic diagram of the utility model;

FIG. 3 is a three-dimensional schematic diagram of the lower fixed formwork and the shared fixed formwork of the present invention;

FIG. 4 is a perspective exploded schematic diagram of a shared fixed die and a valve needle of the present invention;

FIG. 5 is a schematic sectional view 1 of the valve needle action of the present invention;

FIG. 6 is a second schematic sectional view of the valve needle action of the present invention;

7 is a schematic diagram of the injection cycle of the single nozzle, double mold clamping, and single pressure maintaining device of the present invention;

8 is a schematic diagram of the injection cycle of the single nozzle and double mold clamping (excluding the pressure maintaining device) of the present invention.

Description of reference numbers:

The utility model:

1 machine

2 lower fixed templates

21 injection hole

22 Shared mold

221 The first group of cavities

222 The second group of cavities

223 Split runner

224 The first feed channel

225 Second feed channel

231 First control valve needle

232 Second control valve needle

3 upper fixed template

4 injection mechanism

41 Injection nozzle (optional with pressure keeping device)

5 First Activity Template

51 The first moving mold

52 The first clamping mechanism

6 Second Activity Template

61 Second moving die

62 The second clamping mechanism

Detailed ways

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible deformations based on the present invention, and these should be regarded as belonging to the scope of the present invention.

In order to have a more complete and clear record of the technical content, the purpose of the invention and the effect achieved by the utility model, this is described in detail below, and please refer to the accompanying drawings and reference signs of the description together:

First of all, the practical application technology and means of the present invention, please refer to FIG. 1 to FIG. 3 , which are schematic diagrams of the vertical injection molding machine with single nozzle and double clamping of the present invention, mainly on the machine table 1 of the injection molding machine. The upper fixed template 3, the lower fixed template 2, and an injection mechanism 4 is provided on the other side of the lower fixed template 2, and the injection mechanism 4 is provided with an injection nozzle 41 containing a pressure maintaining device (optional), wherein :

A shared fixed mold 22 is installed on the end surface of the lower fixed template 2. The shared fixed mold 22 is provided with an injection hole 21 corresponding to the injection nozzle 41 of the injection mechanism 4. The injection nozzle 41 corresponds to the injection nozzle 41 through the The injection hole 21 of the shared fixed mold 22 on the lower fixed mold plate 2 performs the injection operation. The shared fixed mold 22 includes a first group of mold cavities 221 and a second group of mold cavities 222. Corresponding to the injection hole 21, there is a shunt duct 223, and two ends of the shunt duct 223 are respectively provided with a first feed channel 224, a second set of cavities 221, and a second set of cavities 222. The feed channel 225 is provided, and a first control valve needle 231 and a second control valve needle 232 are provided at the two ends of the split material channel 223 corresponding to the first feed channel 224 and the second feed channel ((225), so The first control valve needle 231 and the second control valve needle 232 are used to control the flow distribution channel 223 to communicate or block flow with the first group of mold cavities 221 and the second group of mold cavities 222;

The upper fixed formwork 3 and the lower fixed formwork 2 are provided with a first movable formwork 5 and a second movable formwork 6 which are arranged adjacently and can be displaced in parallel relative to each other, and the first movable formwork 5 corresponds to the shared fixed formwork. The first set of cavities 221 of 22 is provided with a first movable die 51 , and the second movable die plate 6 is provided with a second movable die 61 corresponding to the second set of cavities 222 of the shared fixed die 22 , and the second movable die 6 is provided with a second movable die 61 . A movable die plate 5 and a second movable die plate 6 are respectively connected and assembled with a first clamping mechanism 52 and a second clamping mechanism 62. The first clamping mechanism 52 and the second clamping mechanism 62 are used to drive the first clamping mechanism 52, respectively. The first movable mold 51 of the movable template 5 and the second movable mold 61 of the second movable template 6 are locked or opened relative to the shared fixed mold 22 of the lower fixed template 2 .

Please refer to FIG. 1 to FIG. 8 , the technical features of the dual mold clamping, single pressure holding device and single injection nozzle of the present invention are mainly used in vertical injection molding machines, which can improve the production of the injection molding machine. Productivity. However, in the actual operation of the present invention, the following detailed description is given.

Please refer to FIG. 5 and FIG. 6 . In actual operation, first, the injection mechanism 4 is driven by power to make the injection nozzle 41 with the pressure maintaining device correspondingly embedded in the lower fixed template 2 . In the injection hole 21 of the shared fixed plate 22; and then let the first movable template 5 be driven by the first clamping mechanism 52 so that the first movable mold 51 corresponds to the second fixed mold 22 of the lower fixed template 2. A group of mold cavities 221 is locked, and at this time, the first control valve needle 231 is retracted, so that the first feed channel 224 and the split material channel 223 of the first group of mold cavities 221 are kept in a flow-through state, while the first control valve needle 231 is retracted. The two control valve needles 232 block the shunt material passage 223 and the second feed passage 225 from leading to the second group of mold cavities 222 through power ejection.

Next, let the injection mechanism 4 store and heat the plastic to inject the plastic into the shunt runner 224 through the injection nozzle 41 containing the pressure maintaining device (optional) corresponding to the injection hole 21, so as to shrink The first control valve needle 231 from the first control valve needle 231 to the first feeding channel 224 leads to the first movable mold 51 between the first group of mold cavities 221 and the first movable template 5; after the injection is completed, the plastic is passed through the The injection nozzle 41 with the pressure maintaining device performs pressure maintaining action through the first control valve needle 231 that continues to shrink inward; and the process of maintaining pressure in the first movable mold 51 and the injection material of the first group of mold cavities 221 starts at the same time. The material storage of the second mold (the pressure holding device allows the pressure holding and the material to be stored in parallel), even after the cooling time of the second mold is over, the second mold clamping mechanism 62 is activated to drive the second movable template 6 to correspond to the lower fixed template The second group of mold cavities 222 on 2 sharing the fixed mold 22 are used for mold opening, ejection and mold closing (please refer to FIG. 7 ). When the first movable mold 51 and the injection material of the first group of mold cavities 221 are kept under pressure and cooled, and the material storage, mold opening and closing (including ejection) of the second movable mold 61 are completed, the injection mechanism 4 will The plastic is injected into the shunt runner 223 through the injection nozzle 41 with the pressure-holding device corresponding to the injection hole 21, and then is guided through the second feed channel 225 to the inwardly retracted second control valve needle 232. The lower fixed mold plate 2 shares the space between the second group of mold cavities 222 of the fixed mold 22 and the mold core of the second movable mold 61 .

Following the above, after the injection is completed, the pressure maintaining action is continued; when the second movable mold 61 and the second group of mold cavities 222 are in the process of maintaining pressure and cooling the injection material, the injection mechanism 4 stores the first mold In this way, according to the above-mentioned process actions, the continuous exchange and circulation of production, let the double movable template, double mold clamping mechanism, single injection nozzle and single pressure holding device continuously exchange the injection process in turn to achieve high efficiency of energy saving and cost reduction. output effect.

It can be seen from the above that when the pressure holding time and cooling time are long, the double movable template, double clamping mechanism, single injection nozzle and single pressure maintaining device are used to make the double movable template stagger the period of pressure maintaining and cooling time. The material storage, mold opening and closing (including ejection) and injection of a movable mold overlap. The following is an actual operation periodic table, as shown in Figure 7, in which:

A represents the first movable mold and the first group of cavity injections; B represents the second movable mold and the second group of mold cavity injections; injection represents plastic injection; Action; plasticizing means storage time; pressure holding means pressure holding time after injection; cooling means cooling time after injection pressure holding; pump means power source.

Mechanical action = mold opening + ejection + ejection + mold closing, referred to as motor;

Holding pressure A+cooling A+motor A>max (holding pressure A, plasticizing B, maneuvering B)+injection B+max (holding pressure B, plasticizing A, maneuvering A) can double the productivity. That is, in the cycle time of injection A + pressure holding A + cooling A + motor A, the movable mold A and the movable mold B are each opened once, and the injection product is ejected. max(holding pressure A, plasticizing B, maneuvering B);

As shown in Figure 7, adding Δ to the right-hand side of the double productivity turns the inequality into an equation. If the pump 2 is driven by a servo motor, the time between plasticizing A and plasticizing B can be slowed down, which does not affect the cycle, but achieves the effect of energy saving.

By the above, the composition of the structure of the present utility model and the description of the use and implementation can be seen that the present utility model has the following advantages compared with the existing structure:

1. The vertical injection molding machine with single injection nozzle and double clamping of the present utility model can continue to carry out the material storage, mold opening and closing (including ejection) and injection filling process of another group of clamping mechanism by using the holding pressure and cooling time. , in order to save time, improve production efficiency, and reduce production equipment costs.

2. The vertical injection molding machine with single injection nozzle and double mold clamping of the present utility model can control the power required in the process of material storage and injection filling by the main power source, while the process of maintaining pressure at a slow speed and a long time uses a small injection molding machine. Power source control, in this way, reduces the load time of the main power source and achieves a large amount of energy saving.

For the detailed explanation of the above-mentioned embodiments, the purpose is only to explain the present utility model, so as to be able to better understand the present utility model, however, these descriptions cannot be interpreted as limitations on the present utility model for any reason, especially, The various features described in different embodiments can also be arbitrarily combined with each other to form other embodiments, unless there is an explicit description to the contrary, these features should be understood as being applicable to any embodiment, and not limited to all described implementation.

Claims (2)

1. A vertical injection molding machine with single injection nozzle and double mold clamping, an upper fixed template and a lower fixed template are arranged on the machine table of the injection molding machine, and an injection mechanism is provided on the other side of the lower fixed template, and the The injection mechanism is provided with a material injection nozzle with a pressure maintaining device, which is characterized in that: The end face of the lower fixed template is provided with a shared fixed mold, and the shared fixed mold is provided with a material injection hole corresponding to the injection nozzle of the injection mechanism, and the injection nozzle is correspondingly installed on the lower fixed template to share the fixed mold. The injection hole of the plate performs the injection action. The shared fixed mold includes a first group of mold cavities and a second group of mold cavities, and the first group of mold cavities and the second group of mold cavities are respectively provided with a first group of mold cavities. The feed channel and the second feed channel, in the shared fixed mold, are provided with a shunt channel that communicates with the corresponding injection holes, and two ends of the shunt channel are respectively provided with a second channel connected to the first group of mold cavities. A feeding channel, a second feeding channel of the second group of mold cavities, and a first control valve needle, a second control valve needle and a second control valve are arranged at the two ends of the shunt channel corresponding to the first feeding channel and the second feeding channel. a valve needle, the first control valve needle and the second control valve needle are used to control the flow distribution channel to communicate or block the flow with the first group of mold cavities and the second group of mold cavities; A first movable template and a second movable template that are adjacently arranged and capable of relative movable displacement are arranged between the upper fixed template and the lower fixed template, and the first movable template corresponds to the first group of the shared fixed templates. The mold cavity is provided with a first movable mold, and the second movable mold plate is provided with a second movable mold corresponding to the second group of mold cavities of the shared fixed mold, and the first movable mold plate and the second movable mold plate are respectively The connecting group is provided with a first clamping mechanism and a second clamping mechanism, and the first clamping mechanism and the second clamping mechanism respectively drive the first movable mold and the second movable mold of the first movable template. The second movable mold is mold-locked or mold-opened relative to the shared fixed mold of the lower fixed template. 2 . The vertical injection molding machine with single injection nozzle and double mold clamping according to claim 1 , wherein the first control valve needle and the second control valve needle are respectively controlled by a hydraulic mechanism. 3 .

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