TWM590094U - Horizontal injection molding machine with single nozzle and dual mold clamping - Google Patents

Abstract

This creation relates to a horizontal injection molding machine with a single nozzle and double mold clamping. There are two adjacent movable templates between the front and rear templates of the machine. The two movable templates are driven by the clamping cylinder on the rear template. Then, an injection mechanism with a pressure maintaining device is provided on the side of the front template, and a fixed half-mold is installed on the front template. The fixed half-mold is used for closing the two movable half-molds on the two movable templates, and then fixed The mold is provided with a hot runner and a split channel. The two ends of the split channel are respectively connected to the left and right mold cavities of the fixed half-mold, and a needle valve that can be opened or closed is provided to make the melt communicate with one of the mold cavities through the open end needle valve to fill , Holding pressure and cooling, at the same time, the needle valve of the other mold cavity is closed and the cooling, storage, opening and closing of the mold are performed; thereby, the staggered cycle action of the two sets of molds is alternately performed with a single nozzle and a double clamping mold. To achieve the effects of high-efficiency production, energy saving and cost reduction.

Description

Horizontal injection molding machine with single nozzle and double clamping

This creation relates to a horizontal injection molding machine with a single nozzle and double clamping, especially a mechanism used to increase production capacity on a horizontal injection molding machine. The focus is on the use of single injection nozzles and double clamping Two staggered cyclic actions are carried out on the two sets of molds to achieve productivity improvement, energy saving, and cost reduction.

In the previous injection molding machine, the screw was rotated in the injection mechanism to melt the resin while sending the melt to the nozzle at the front of the screw. The nozzle was placed at the front of the screw to inject the melt into the mold and melt in the mold After internal cooling and solidification, the mold is opened, and the product attached to the mold is moved to the outside of the mold by the ejector pin, and the product is formed in this way.

For the detailed operation principle of the above single-mode injection molding machine, please refer to the twelfth figure, in order to move the clamping oil cylinder (91) mounted on the machine table (9) to the tail plate, and amplify the force through the hinge Then push the movable template (92) to close the mold, and then continue to drive the screw (93) through the motor to feed the granular plastic from the heated injection mechanism (94) into a flowing state [plasticization, storage], and toward the nozzle The melt flowing in the (941) direction generates a reaction force during the guide, which causes the screw (93) to move back to the set storage position. After that, the screw rod (93) is pushed forward through the piston rod of the injection cylinder (95), and the melt stored in the injection mechanism (94) is injected into the mold through the nozzle (941). After the injection is completed, after the pressure holding and cooling process, the clamping oil cylinder (91) is driven back to form a mold opening and the solidified molded products in the mold are ejected.

However, before the injection process of the plastic injection molding machine, the granular plastic is rubbed and compressed by the rotation of the hopper through the feeding screw, and heated by the external electric heating sheet of the injection mechanism (94) to be transformed into molten. Melting will shrink and expand. When the cavity is filled with molten injection, it must continue to fill to prevent the product from forming an unsatisfactory shape after cooling and shrinking. This filling action is the so-called "holding pressure".

From the above, it can be seen that the larger the wall thickness of the product made by the single-mold injection molding machine in the prior art, the longer the pressure holding and cooling time; relatively, the slower the production speed of the product, the lower the production capacity, and Increasing manufacturing costs is not in line with economic benefits and needs improvement.

When the injection molding machine includes a pressure-retaining device, the pressure-retaining device will be installed between the injection mechanism (94) and the nozzle (941), so that while maintaining pressure to the front through the nozzle (941), the rear screw (93) It can rotate and plasticize, so as to achieve the overlapping of holding pressure and plasticizing action, which has the effect of shortening the cycle time.

The reason is that in view of this, the creators have maintained rich design development and practical production experience in the related industries for many years, researched and improved the existing structure and deficiencies, and provided a horizontal injection molding machine with a single nozzle and double clamping mold; One set of molds has a long holding pressure and cooling time, and plasticizes, opens, ejects, ejects, closes, injects, and plasticizes the other set of molds in order to increase productivity and reduce energy consumption. .

The main purpose of this creation is to provide a horizontal injection molding machine with a single injection nozzle and double clamping, especially a mechanism used to increase production capacity on a horizontal injection molding machine. The focus is on the use of single injection nozzles and double injection molding machines. The mold clamping alternately performs staggered cyclic actions to achieve energy saving and increase productivity.

The main purpose and function of the horizontal injection molding machine with single injection nozzle and double clamping mode are achieved by the following specific technical means:

The main point is that there are two movable templates adjacent to the left and right between the front and rear templates on the machine table. The two movable templates are driven by two clamping oil cylinders installed on the rear template, and then set on the other side of the front template There is an injection mechanism, which has a pressure-holding device, and a fixed mold half is installed on the front mold plate, and the fixed mold half is provided with two movable mold half mold locks on two movable mold plates, and a hot runner is installed on the fixed mold half The hot runner is connected to the left and right two sets of mold cavities of the fixed half-mold through the runner, and a needle valve can be opened or closed at the two ends of the runner; the molten needle valve is connected to the The cavity of the mold on one movable template is filled, kept under pressure, and cooled, and at the same time, the closed needle valve corresponds to the mold on the other movable template to cool, store, open and close the mold [including ejection] action In this way, the two cycles of the two sets of molds are alternately performed with a single nozzle and a double-clamping mold, so that they can achieve high-efficiency production, energy saving, and cost reduction.

This is a preferred embodiment of a horizontal injection molding machine with a single injection nozzle and a double-clamping mold. When the mold is controlled by a hot runner needle valve, that is, there are needle valves in each cavity, the needle valve at the end of the above-mentioned runner is Can be canceled; the needle valve group on the left mold cavity group is fully opened, and the needle valve group on the right mold cavity group is fully closed, then the left cavity cavity group is filled, maintained, and cooled; the needle valve group on the right mold cavity group is fully opened , With the needle valve group of the left mold cavity group fully closed, the right mold cavity group will be filled, maintained and cooled.

Based on the above, the composition of the creative structure and the implementation instructions show that compared with the existing structure, the creative has the following advantages:

1. This creation of a single injection nozzle, double mold clamping horizontal injection molding machine, which uses the filling, holding pressure and cooling time to continue the cooling, storage, opening and closing of another set of molds [including ejection] process, In order to achieve time-saving and improve production efficiency, reduce production equipment costs and other effects.

2. The horizontal injection molding machine with single injection nozzle and double clamping mode is used to control the power required in the storage and injection filling operations by the main power source, and the slow holding pressure action for a very long time uses small power. Driven by the source, so that the load time of the main power source is reduced, and a large amount of energy saving effect is achieved.

This creation:

(1)‧‧‧machine

(2)‧‧‧Former template

(21)‧‧‧shot hole

(22)‧‧‧Fixed half mold

(221)‧‧‧ First cavity

(222)‧‧‧The second set of cavity

(223)‧‧‧hot runner

(224)‧‧‧Diversion

(231)‧‧‧First needle valve

(232)‧‧‧Second needle valve

(241)‧‧‧The first needle valve group

(242)‧‧‧Second needle valve group

(3)‧‧‧Post template

(4)‧‧‧Injection mechanism

(41)‧‧‧Injection nozzle

(42)‧‧‧pressure holding device

(5)‧‧‧The first activity template

(51)‧‧‧The first half-mold

(52)‧‧‧The first clamping cylinder

(6)‧‧‧Second activity template

(61)‧‧‧The second movable half

(62)‧‧‧Second clamping oil cylinder

existing:

(9)‧‧‧machine

(91)‧‧‧Clamping cylinder

(92)‧‧‧Activity template

(93)‧‧‧Screw

(94)‧‧‧Injection mechanism

(941)‧‧‧Nozzle

(95) ‧‧‧ injection cylinder

The first picture: the sketch of the three-dimensional appearance of this creation.

The second picture: a schematic view of the stereoscopic appearance of this creation from another angle.

The third picture: a top view of this creation.

Figure 4: Schematic diagram of the fixed half-mold of this creation.

Fifth figure: A schematic cross-sectional view I of the closed and opened states of the pressure-maintaining device, the hot runner, the shunt, the first needle valve and the second needle valve in this creation.

Figure 6: Schematic diagram of the cross section of the closed and open states of the hot runner, the branch runner, the first needle valve and the second needle valve in this creation.

Figure 7: Schematic diagram 3 of the cross-sectional view of the closed and open states of the hot runner, the split runner, the first needle valve and the second needle valve in this creation.

Figure 8: Schematic diagram of another embodiment of this creation (each mold cavity has a needle valve).

The ninth figure is a schematic cross-sectional view showing the opening of the first needle valve group and the closing of the second needle valve group in another embodiment.

The tenth figure: The creation of a single nozzle (single pressure holding device), double clamping mode injection cycle diagram.

Figure 11: The action flow chart of this creation.

Figure 12: The schematic diagram of the stereoscopic appearance of the prior art injection machine.

In order to provide a more complete and clear disclosure of the technical content used in this creation, the purpose of the creation and the effect achieved, please refer to the detailed description below, and please refer to the drawings and figures disclosed:

First of all, the actual technology and means used in this creation, please refer to the first to fourth figures, which are the three-dimensional appearance and top schematic view of the creation of a single injection nozzle and double clamping horizontal injection molding machine, which is mainly used in the injection molding machine. The platform (1) is provided with front and rear templates (2) and (3), and an injection mechanism (4) is provided on the side of the front template (2), and the injection mechanism (4) is provided with an internal protection The injection nozzle (41) of the pressing device (42), wherein: a injection hole (21) is provided at one side of the front template (2) corresponding to the injection nozzle (41) of the injection mechanism (4) The injection nozzle (41) performs injection and holding pressure corresponding to the injection hole (21) of the front template (2), and a fixed half mold (22) is provided on the other side of the front template (2) ), the first set of mold cavities (221) and the second set of mold cavities (222) are provided inside the fixed mold half (22); adjacent to the front and rear mold plates (2), (3) And movable first and second movable templates (5, 6), the first movable template (5) is equipped with a first movable mold half (51), corresponding to the first group of the fixed mold half (22) Cavity (221), and the second movable template (6) is equipped with a second movable mold half (61), corresponding to the second set of mold cavities (222) of the fixed mold half (22), and the first 1. The second movable template (5, 6) is driven by the first and second clamping oil cylinders (52, 62) installed on the rear template (3) respectively, so that the first movable template (5) The movable mold half (51), the second movable mold half (61) of the second movable mold plate (6), and the first group of mold cavities (221) and the first mold cavity (221) on the fixed mold half (22) of the front mold plate (2) The two sets of mold cavities (222) are locked or opened.

When the actual operation is implemented, you can see that this creation is different from the previous injection machine. There are two first and second movable templates (5, 6) side by side, which are installed in the rear template (3) The first and second clamping oil cylinders (52, 62) are driven to achieve the purpose of independent mold opening and closing. Both the first and second movable templates (5, 6) have their ejection devices, and can also eject and retract independently.

On the mold side, first and second movable mold halves (51, 61) are installed on the left and right first and second movable mold plates (5, 6), respectively. The first and second movable mold halves (51, 61) Each has a set of cores. A fixed mold half (22) is provided on the front mold plate (2), and the mold cavity of the fixed mold half (22) is divided into two groups separated side by side, called a first group of mold cavities (221) and a second group of molds Cavities (222), which correspond to the two sets of mold cores of the first and second movable mold halves (51, 61) respectively.

As shown in the fifth figure, the melt is injected into the hot runner (223) of the fixed mold half (22) through the pressure holding device (42) and the injection nozzle (41) in the injection mechanism (4). The hot runner (223) is connected to the branch channel (224) to shunt the melt to the first group of mold cavities (221) and the second group of mold cavities (222) but first passes through the first and second needle valves (231, 232) ) Obstruction or connection can only be successful. In the fifth picture, the first needle valve (231) is closed, blocking the melt flow to the first group of mold cavities (221), so the mold can only perform mold opening, ejection, ejection, and mold closing actions, while the second needle The valve (232) is opened to connect the melting of the shunt channel (224) to the second set of mold cavities (222), so the injection function can perform injection, pressure holding and plasticizing actions on the second set of mold cavities (222) that have been locked.

The function of the pressure-holding device is to perform the pressure-holding action on the mold cavity group with the needle valve open at the same time when the injection mechanism (4) is plasticized, so as to achieve the goal of parallel pressure-holding and plasticization. Depending on whether the holding time is long or the plasticizing time is long, a short action is hidden in the long action, effectively shortening the cycle time.

The sixth picture is the same as the fifth picture, except that the first needle valve (231) is closed to block the fusion to the first group of mold cavities (221), and the second needle valve (232) is opened to connect the fusion to the second Illustration of the set of mold cavities (222).

The seventh figure is just the opposite. The second needle valve (232) is closed to block the fusion to the second group of mold cavities (222), and the first needle valve (231) is opened to communicate with the first group of mold cavities (221).

When the mold is a needle valve mold, please refer to the eighth and ninth figures, that is, each mold cavity is provided with a needle valve, there is no need to add the first needle valve (231) and the second needle valve (232), but The first needle valve group (241) and the second needle valve group (242) are used to achieve the purpose of communicating and blocking the flow between the first group of mold cavities (221) and the second group of mold cavities (222). If the mold has been controlled by a hot runner needle valve (that is, there is a needle valve in each cavity), the above-mentioned needle valve on the split flow channel can be cancelled; the needle valve group of the left cavity group is fully opened, and the needle valve of the right cavity group is matched When the group is completely closed, the left cavity group is filled, pressure-holding, and plasticized; the needle valve group on the right cavity group is fully opened, and the needle valve group on the left cavity group is completely closed, and the right cavity group is filled , Pressure holding, plasticizing.

The tenth figure is the action sequence diagram of the first group of cavity (abbreviated as A) and the second group of cavity (abbreviated as B). The horizontal injection molding machine with single injection nozzle and double clamping has three sets of oil pumps, called pump 1, pump 2, and pump 3. Pump 1 is responsible for the injection and plasticization of the two sets of molds. Maneuvering is the abbreviation of mechanical action, including mold opening, mold closing (including mold clamping), ejection, ejection, and manipulator entry and removal. This means that the details in the maneuver need not be distinguished and will not affect the cycle and cycle time.

The pump 2 is responsible for the motor movement of the two sets of molds.

The pump 3 is responsible for the pressure maintaining action of the two sets of molds.

A cycle time is calculated from the start of injection A. Injection A is in charge of pump 2. After injection, the pressure is maintained. Due to the design of the pressure holding device, plasticization and pressure holding can be performed simultaneously. Pump 3 is responsible for holding pressure A, and pump 2 is responsible for plasticizing B.

Because there are three sets of oil pumps, it can also maneuver B while holding pressure A and plasticizing B. Motor B is under the charge of pump 1, and it started with injection A at the earliest. The juxtaposition of the three actions makes the cycle time to this creation shorter.

Just like the standard injection molding machine cycle, after plasticizing B and mold clamping B are completed, B can be injected. The start of injection B is also the starting point of the B cycle time.

After injection of B, the pressure is maintained. Thanks to the design of the pressure-retaining device, plasticizing A can be started at the same time.

After holding the pressure A, it is cooling A. After cooling A, mold A can be opened, which is the beginning of motor A. After the mold clamping A and plasticizing A are completed, A can be injected. If the plasticization A is completed before the motorization A by △ time, consider reducing the plasticization speed. For injection machines driven by servo motors, low plasticizing speed will be more energy-efficient.

When the maneuver A is completed, it is the end of the A cycle time.

Similarly, the completion of the maneuver B is the end of the B cycle time.

From the tenth figure, you can find the bottleneck of the action time, which is helpful to optimize the cycle time. The figure shows that due to the delta time, the plasticizing time is not a bottleneck.

It can be seen from the above that when the pressure holding time and cooling time are long, the double movable template, the double mold clamping mechanism, the single injection nozzle and the single pressure holding device are used to make the pressure holding and cooling time of one mold and the other mold. The storage and opening and closing mold [including ejection] overlaps with the injection [in fact, it also overlaps with its own plasticization], which can shorten the cycle time.

It can be seen from the tenth figure that when the following inequality is satisfied, its Holding pressure A + cooling A + motorization A> max (holding pressure A, plasticizing B, motorizing B) + injection B + max (holding pressure B, plasticizing A, motorizing A), you can double the productivity. In the cycle time of injection A + holding pressure A + cooling A + motorization A, mold A and mold B are opened once each time, and some products are ejected.

It can be seen from the tenth figure that adding △ to the right-hand side of plasticizing A can change the inequality into an equation. If the pump 2 is driven by a servo motor, the plasticization A and the plasticization B can be delayed for a total of △ long time, which will not affect the cycle, but achieves the effect of energy saving.

The eleventh figure is an action flowchart.

In the starting state, the A and B molds are open, and there is no plasticized plastic in the injection mechanism. Therefore, at the beginning, a plasticizer A will come first, and then a mold clamping A (including mold clamping A). After that, the holding pressure A and the plasticizing B are started together. This is because the relationship between the holding pressure device and the two actions can be performed simultaneously. After the first injection of A, there is also a closed mold B (because the B mold has been opened), including the clamp B.

After holding the pressure A, it is cooling A, and then it is maneuvering A.

After plasticizing B is completed and mold clamping B is completed, B can be injected.

After injection B is completed, the pressure is maintained. Due to the pressure holding device, A can be plasticized while holding pressure B.

The completion of holding pressure B is cooling B. Then it is Maneuver B.

When motorized B is completed and plasticized B is also completed, B can be injected.

Similarly, when motorized A is completed and plasticized A is also completed, A can be injected.

However, the foregoing embodiments or drawings do not limit the product form, structure or use of the product created. Any simplification, if no pressure holding device is used, three sets of oil pumps are not used, only one or The second group of oil pumps will only affect the cycle time, and appropriate changes or modifications of those with ordinary knowledge in the technical field should be regarded as not departing from the scope of the patent of this creation.

Based on the above, the composition of the creative structure and the implementation instructions show that compared with the existing structure, the creative has the following advantages:

1. The horizontal injection molding machine with single injection nozzle and double locking molds uses the holding pressure and cooling time of one set of molds to store, open and close the other set of molds [including ejection] and injection filling. Process to achieve the effects of improving production efficiency and reducing production costs.

2. The horizontal injection molding machine with single injection nozzle and double clamping mode is used to control the power required in the storage and injection filling operations by the main power source, and the slow holding pressure action for a very long time uses small power. Source control, in this way, reduces the load time of the main power source and achieves a large amount of energy saving effect.

In summary, this creative example does achieve the expected effect, and the specific structure disclosed by it has not only not been seen in similar products, nor has it been disclosed before the application, and has fully complied with the provisions of the Patent Law and To request that you file an application for a new type of patent in accordance with the law, pleading for the review and granting the patent, you feel truly virtuous.

(2)‧‧‧Former template

(21)‧‧‧shot hole

(22)‧‧‧Fixed half mold

(221)‧‧‧ First cavity

(222)‧‧‧The second set of cavity

(223)‧‧‧hot runner

(224)‧‧‧Diversion

(231)‧‧‧First needle valve

(232)‧‧‧Second needle valve

(4)‧‧‧Injection mechanism

(41)‧‧‧Injection nozzle

(42)‧‧‧pressure holding device

Claims (4)

A horizontal injection molding machine with single injection nozzle and double clamping modes, which is mainly provided with front and rear templates on the machine table of the injection molding machine, an injection mechanism is provided on one side of the front template, and the injection mechanism is provided with a Injection nozzle with pressure holding device, in which: A spray hole is provided on one side of the front template corresponding to the injection nozzle of the injection mechanism, and the injection nozzle corresponds to the injection hole of the front template to perform the injection and pressure holding action, and then to the front template The other side group is provided with a fixed half mold. The fixed half mold is provided with a first set of mold cavities and a second set of mold cavities. A first needle valve is connected behind the first set of mold cavities, and the first A second needle valve is connected to the rear of the two sets of mold cavities, the first and second needle valves are connected to a shunt channel, and the shunt channel is connected to a hot runner channel, and the hot runner channel is connected to the injection hole through The first and second needle valves control the flow channel to connect or block flow to the first and second sets of mold cavities; Adjacent and movable first and second movable templates are provided between the front and rear templates. The first movable template is equipped with a first movable mold half corresponding to the first set of mold cavities of the fixed mold half , And the second movable template is equipped with a second movable mold half, corresponding to the second set of mold cavities of the fixed mold half, and the first and second movable molds are respectively composed of the first and second movable mold plates installed on the rear mold plate. The second clamping oil cylinder is driven to make the first movable mold half of the first movable mold plate and the second movable mold half of the second movable mold plate relative to the first group of mold cavities and the second mold cavity on the fixed mold half of the front mold plate. The mold cavity is locked or opened. The single injection nozzle and the double-clamping horizontal injection molding machine as described in item 1 of the patent application scope, wherein the first and second needle valves are controlled by one of oil pressure and air pressure. A horizontal injection molding machine with single injection nozzle and double clamping modes, which is mainly provided with front and rear templates on the machine table of the injection molding machine, an injection mechanism is provided on one side of the front template, and the injection mechanism is provided with a Injection nozzle with pressure holding device, in which: A spray hole is provided on one side of the front template corresponding to the injection nozzle of the injection mechanism, and the injection nozzle corresponds to the injection hole of the front template to perform the injection and pressure holding action, and then to the front template The other side group is provided with a fixed half mold. The fixed half mold is provided with a first set of mold cavities and a second set of mold cavities. A first needle valve with one needle valve per cavity is provided in the first set of mold cavities Group, the first needle valve group is connected to one end of a branch channel, and the second group of mold cavities is provided with a second needle valve group with one needle valve per cavity, and the second needle valve group is connected to the The other end of the shunt channel, and the shunt channel is connected to a hot runner, the hot runner is connected to the injection hole, and the shunt channel is connected or controlled by the plurality of first and second needle valve groups. Block flow to the first and second sets of mold cavities; Adjacent and movable first and second movable templates are provided between the front and rear templates. The first movable template is equipped with a first movable mold half corresponding to the first set of mold cavities of the fixed mold half , And the second movable template is equipped with a second movable mold half, corresponding to the second set of mold cavities of the fixed mold half, and the first and second movable molds are respectively composed of the first and second movable mold plates installed on the rear mold plate. The second clamping oil cylinder is driven to make the first movable mold half of the first movable mold plate and the second movable mold half of the second movable mold plate relative to the first group of mold cavities and the second mold cavity on the fixed mold half of the front mold plate. The mold cavity is locked or opened. The single injection nozzle and the double-clamping horizontal injection molding machine as described in item 3 of the patent application scope, wherein the first and second needle valve groups are controlled by one of oil pressure and air pressure.

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