Molding equipment

Abstract

The utility model provides forming equipment, which comprises a material storage barrel, a drying machine, a material storage cup, an injection part and an injection molding machine which are sequentially communicated through a material pipeline to form an injection molding flow path, the drying machine comprises a negative pressure suction mechanism which is used for providing driving force for materials to enter the material storage cup from the material storage barrel through the drying machine, and the negative pressure suction mechanism is provided with a first inlet; the material storage barrel comprises a first gas outlet and a material barrel inlet, and the forming equipment further comprises a first back suction branch which is communicated with the first gas outlet of the material storage barrel and an inlet of the negative pressure suction mechanism; the first end of the second resorption branch is communicated with the material pipeline between the storage cup and the injection part, and the second end of the second resorption branch is communicated with the inlet of the charging barrel; and the back suction switch valve is arranged on the second back suction branch and is used for controlling the connection or disconnection of the second back suction branch. According to the utility model, an operator only needs to control the opening and closing of the negative pressure suction mechanism and the back-suction switch valve to realize the recovery of residual materials, so that the back-suction process is simplified, and the risks of climbing and scalding are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, and particularly relates to a molding equipment capable of automatically sucking back residual materials. Background Art

[0002] The injection molding equipment includes a material storage barrel, a dryer (including a heating barrel and a negative pressure suction mechanism), a material storage cup, an injection part and an injection molding machine which are connected in sequence. The materials in the material storage barrel are sent into the injection molding cup after being heated and dried by the dryer. The materials at the outlet of the material storage cup are injected into the injection molding machine through the injection part, and the injection molding machine processes the materials into a molded product.

[0003] When the injection molding machine stops running, it is necessary to discharge the residual materials (such as resin) in the material storage cup. Usually, an operator needs to climb to a height to remove the material storage cup, take out the materials, and then reinstall the material storage cup. There is a risk of scalding, and the work is cumbersome. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a molding equipment, which includes a material storage barrel, a dryer, a material storage cup, an injection part and an injection molding machine that are sequentially connected through a material pipeline to form an injection molding flow path. Among them,

[0005] The dryer includes a negative pressure suction mechanism for providing a driving force for the materials to enter the material storage cup from the material storage barrel through the dryer. The negative pressure suction mechanism has a first inlet;

[0006] The material storage barrel includes a first gas outlet and a barrel inlet. The molding equipment further includes:

[0007] A first suction-back branch, which is connected between the first gas outlet of the material storage barrel and the inlet of the negative pressure suction mechanism;

[0008] A second suction-back branch, the first end of the second suction-back branch is connected to the material pipeline between the material storage cup and the injection part, and the second end of the second suction-back branch is connected to the barrel inlet;

[0009] A suction-back switch valve, which is arranged on the second suction-back branch for controlling the on or off of the second suction-back branch.

[0010] According to the technical solution, the negative pressure suction mechanism evacuates the material storage barrel, so that a negative pressure is generated in the material storage barrel, the second suction-back branch connected to the barrel inlet of the material storage barrel, and the material storage cup, realizing the suction-back of the residual materials in the material storage cup. The operator only needs to control the opening and closing of the negative pressure suction mechanism and the suction-back switch valve to realize the recovery of the residual materials in the material storage cup, simplifying the suction-back process and reducing the risk of climbing to a height and scalding.

[0011] In an optional technical solution of the utility model, the first end of the second suction-back branch is higher than the second end of the second suction-back branch.

[0012] According to this technical solution, the material in the storage cup flows towards the storage cylinder under the action of gravity, which is beneficial to improving the back suction efficiency.

[0013] In an alternative technical solution of the present utility model, it further includes a first switch member, which is arranged on the first back suction branch and is used to control the on or off of the first back suction branch.

[0014] According to this technical solution, when the back suction switch valve is opened, the second back suction branch is communicated with the storage cylinder and the first back suction branch, the negative pressure suction mechanism is opened, the first switch member is opened, the air in the storage cylinder and the second back suction branch is sucked by the negative pressure suction mechanism through the first back suction branch, and the remaining material in the storage cup flows into the storage cylinder through the second back suction branch. When the feeding and injection molding process is carried out, the first switch member is closed.

[0015] In an alternative technical solution of the present utility model, the dryer further includes:

[0016] A heating cylinder and a drying box that are sequentially communicated between the material outlet of the storage cylinder and the material inlet of the storage cup; a negative pressure suction mechanism is arranged in the drying box;

[0017] A hot air blower, which is arranged in the drying box.

[0018] According to this technical solution, before injection molding, the material is heated by the heating cylinder so that the material is in a state suitable for injection molding, which is convenient for subsequent injection molding processing. The heated material is dried by hot air, which can reduce the moisture and humidity in the material, ensure that the dryness of the material meets the requirements of the injection molding process, prevent quality problems such as bubbles and shrinkage during the injection molding process, and improve the injection molding quality.

[0019] In an alternative technical solution of the present utility model, the heating cylinder has a second gas outlet; the negative pressure suction mechanism includes a second inlet, and the molding equipment further includes

[0020] A first suction pipeline, and both ends of the first suction pipeline are respectively communicated with the second gas outlet and the second inlet of the negative pressure suction mechanism;

[0021] A second switch member, which is arranged on the first suction pipeline and is used to control the on or off of the first suction pipeline.

[0022] According to this technical solution, during feeding, the back suction switch valve is closed, the negative pressure suction mechanism is opened, the second switch member is opened, the air in the heating cylinder is sucked by the negative pressure suction mechanism through the first suction pipeline, negative pressure is generated in the heating cylinder, the heating cylinder is communicated with the storage cylinder, and the material in the storage cylinder enters the heating cylinder under the action of negative pressure to realize the heating of the material.

[0023] In an alternative technical solution of the present utility model, it further includes a photoelectric sensor, which is used to detect the weight of the material in the storage cup, and the photoelectric sensor is electrically connected to the second switch member and the negative pressure suction mechanism.

[0024] According to this technical solution, when the photoelectric sensor detects that the amount of material in the storage cup is insufficient, it sends a signal to the negative pressure suction mechanism. The negative pressure suction mechanism is activated, the second switching element is opened, and the material in the storage cylinder enters the heating cylinder under negative pressure for heating and then is conveyed to the storage cup. The setting of the photoelectric sensor can monitor the amount of material in real time, improve the automation degree of injection molding, and is beneficial to ensuring the continuous progress of injection molding.

[0025] In an alternative technical solution of the present utility model, the storage cup has a third gas outlet, the negative pressure suction mechanism includes a third inlet, and the molding device further includes

[0026] a second suction pipeline, and both ends of the second suction pipeline are respectively communicated with the third gas outlet and the inlet of the negative pressure suction mechanism;

[0027] a third switching element, which is arranged on the second suction pipeline and is used to control the on or off of the second suction pipeline.

[0028] According to this technical solution, during feeding, the negative pressure suction mechanism is activated, the third switching element is opened, the negative pressure suction mechanism sucks the air in the second suction pipeline and the storage cup, so that negative pressure is generated in the storage cup. The storage cup is communicated with the material outlet of the drying box, and the material in the drying box enters the storage cup under negative pressure to overcome gravity to achieve feeding. The material driving method in this technical solution is simple and easy to control.

[0029] In an alternative technical solution of the present utility model, the box body of the drying box is provided with:

[0030] a first switch button for controlling the opening and closing of the first switching element and the opening and closing of the negative pressure suction mechanism;

[0031] a second switch button for controlling the opening and closing of the back suction switch valve.

[0032] According to this technical solution, by pressing the first switch button and the second switch button, the negative pressure suction mechanism can be controlled to be activated, the second back suction branch can be unblocked, and the material can be back-sucked. The control method is simple and convenient. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of the molding device in the embodiment of the present utility model.

[0034] Figure 2 is a schematic internal structural diagram of the drying box in the embodiment of the present utility model.

[0035] Figure 3 is a schematic structural diagram of the storage cylinder in the embodiment of the present utility model.

[0036] Figure 4 is a schematic external structural diagram of the dryer in the embodiment of the present utility model.

[0037] Reference numerals:

[0038] Material storage cylinder 1; First gas outlet 11; Cylinder inlet 12; Dryer 2; Negative pressure suction mechanism 20; Heating cylinder 21; Second gas outlet 211; Drying box 22; First pipe joint 221; Second pipe joint 222; Third pipe joint 223; First switch button 224; Second switch button 225; Third switch button 226; Fourth switch button 227; Material storage cup 3; Third gas outlet 31; Injection part 4; Injection molding machine 5; First back suction branch 61; Second back suction branch 62; Back suction switch valve 63; First suction pipe 71; Second suction pipe 72; First switch member 81; Second switch member 82; Third switch member 83. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] As Figure 1 、 Figure 2 shown, this embodiment provides a molding device, including a material storage cylinder 1, a dryer 2, a material storage cup 3, an injection part 4, an injection molding machine 5, a first back suction branch 61, a second back suction branch 62, a back suction switch valve 63, a first suction pipe 71 and a second suction pipe 72 that are sequentially connected through a material pipeline to form an injection molding flow path.

[0041] Specifically, the dryer 2 includes a heating cylinder 21, a drying box 22, a hot air blower (not shown in the figure) and a negative pressure suction mechanism 20. The negative pressure suction mechanism 20 is used to provide the driving force for the material to enter the material storage cup 3 from the material storage cylinder 1 through the dryer 2; the negative pressure suction mechanism 20 is arranged in the drying box 22, and the inlet of the negative pressure suction mechanism 20 is divided into a first inlet, a second inlet and a third inlet. Figure 2Only the first pipe joint 221, the second pipe joint 222, and the third pipe joint 223 respectively corresponding to and connected to the first inlet, the second inlet, and the third inlet are shown. The heating cylinder 21 and the drying box 22 are successively connected to the material pipeline between the material outlet of the storage barrel 1 and the material inlet of the storage cup 3; a hot air blower (not shown) is provided inside the drying box 22. Before injection molding, the material is heated by the heating cylinder 21 to make the material in a state suitable for injection molding, facilitating subsequent injection molding processing. The hot air drying of the heated material can reduce the moisture and humidity in the material, ensure that the dryness of the material meets the requirements of the injection molding process, prevent quality problems such as bubbles and shrinkage during injection molding, and improve the injection molding quality.

[0042] The storage barrel 1 is used to accommodate the cold material for injection molding. In combination with Figure 2 , Figure 3 as shown, the storage barrel 1 includes a first gas outlet 11 and a barrel inlet 12. The first suction branch 61 is connected between the first gas outlet 11 of the storage barrel 1 and the first inlet of the negative pressure suction mechanism 20 (the first suction branch 61 is specifically connected between the first gas outlet 11 of the storage barrel 1 and the first pipe joint 221); the first end of the second suction branch 62 is connected to the material pipeline between the storage cup 3 and the injection part 4, and the second end of the second suction branch 62 is connected to the barrel inlet 12; a suction switch valve 63 is provided on the second suction branch 62 for controlling the on or off of the second suction branch 62.

[0043] In this embodiment, the negative pressure suction mechanism 20 evacuates the storage barrel 1, so that a negative pressure is generated in the storage barrel 1, the second suction branch 62 connected to the barrel inlet 12 of the storage barrel 1, and the storage cup 3, realizing the suction of the remaining material in the storage cup 3. The operator only needs to control the opening and closing of the negative pressure suction mechanism 20 and the suction switch valve 63 to realize the recovery of the remaining material in the storage cup 3, simplifying the suction process and reducing the risks of climbing heights and scalding.

[0044] In the preferred embodiment of the present utility model, the first end of the second suction branch 62 is higher than the second end of the second suction branch 62. The material in the storage cup 3 flows towards the storage barrel 1 under the action of gravity, which is beneficial to improving the suction efficiency.

[0045] In a preferred embodiment of the present utility model, the molding device further includes a photoelectric sensor (not shown in the figure) for detecting the amount of material in the storage cup 3. The photoelectric sensor is electrically connected to the second switch member 82 and the negative pressure suction mechanism 20. The photoelectric sensor is specifically a photoelectric opposed sensor, including a transmitter and a receiver, and determines the change in the amount of material according to the change in the light intensity in the receiver. When the photoelectric sensor detects that the amount of material in the storage cup 3 (such as the liquid level of the material is lower than the lower limit value) is insufficient, it sends a signal to the negative pressure suction mechanism 20. The negative pressure suction mechanism 20 is turned on, and the second switch member 82 is turned on. The material in the storage cylinder 1 enters the heating cylinder 21 for heating under the action of negative pressure and then is conveyed to the storage cup 3. The setting of the photoelectric sensor can monitor the amount of material in real time, improve the automation degree of injection molding, and is beneficial to ensuring the continuous progress of injection molding. In some embodiments, the photoelectric sensor can also be set to be connected to a control device (not shown), and the opening and closing of the negative pressure suction mechanism 20 and the second switch member 82 are controlled through the control device.

[0046] In the embodiment of the present utility model, as Figure 1 , Figure 4 shown, the drying box 22 is provided with three pipe joints, and the three pipe joints are converged and connected to the inlet of the negative pressure suction mechanism 20. The heating cylinder 21 has a second gas outlet 211; the storage cup 3 has a third gas outlet 31. The molding device further includes a first suction pipeline 71 and a second suction pipeline 72. The two ends of the first suction pipeline 71 are respectively communicated with the second gas outlet 211 and the second inlet of the negative pressure suction mechanism 20; the two ends of the second suction pipeline 72 are respectively communicated with the third gas outlet 31 and the third inlet of the negative pressure suction mechanism 20. Specifically, the two ends of the first suction pipeline 71 are respectively communicated with the second gas outlet 211 and the second pipe joint 222, and the two ends of the second suction pipeline 72 are respectively communicated with the third gas outlet 31 and the third pipe joint 223.

[0047] In this embodiment, the negative pressure suction mechanism 20 evacuates the heating cylinder 21 through the first suction pipeline 71 to generate negative pressure in the heating cylinder 21. The heating cylinder 21 is communicated with the storage cylinder 1, and the material in the storage cylinder 1 enters the heating cylinder 21 under the action of negative pressure to realize feeding. The negative pressure suction mechanism 20 evacuates the storage cup 3 through the second suction pipeline 72 to generate negative pressure in the storage cup 3. The storage cup 3 is communicated with the material outlet of the drying box 22, and the material in the drying box 22 enters the storage cup 3 under the action of negative pressure to realize feeding. The material driving method in this technical solution is simple.

[0048] Further, in this embodiment, continue to refer to Figure 2, a switch for controlling the on / off of the gas path is provided corresponding to each pipe joint and the inlet of the negative pressure suction mechanism 20. For example, the first switch 81 is provided in the first back suction branch 61 to control the on or off of the first back suction branch 61; the second switch 82 is provided in the first air suction pipeline 71 to control the on or off of the first air suction pipeline 71; the third switch 83 is provided in the second air suction pipeline 72 to control the on or off of the second air suction pipeline 72.

[0049] Specifically, in combination with Figure 1 As shown, during back suction, when the back suction switch valve 63 is opened, the second back suction branch 62 is connected to the storage barrel 1 and the first back suction branch 61, the negative pressure suction mechanism 20 is turned on, the first switch 81 is turned on, and the air in the storage barrel 1 and the second back suction branch 62 is sucked by the negative pressure suction mechanism 20 through the first back suction branch 61, and the remaining material in the storage cup 3 flows into the storage barrel 1 through the second back suction branch 62. During the feeding and injection molding process, the first switch 81 is turned off.

[0050] During feeding, the back suction switch valve 63 is closed, the negative pressure suction mechanism 20 is turned on, the second switch 82 is turned on, and the air in the heating barrel 21 is sucked by the negative pressure suction mechanism 20 through the first air suction pipeline 71, a negative pressure is generated in the heating barrel 21, the heating barrel 21 is connected to the storage barrel 1, and the material in the storage barrel 1 enters the heating barrel 21 under the action of the negative pressure to realize heating of the material.

[0051] During feeding, the negative pressure suction mechanism 20 is turned on, the third switch 83 is turned on, and the air in the second air suction pipeline 72 and the storage cup 3 is sucked, thereby generating a negative pressure in the storage cup 3. The material inlet of the storage cup 3 is connected to the material outlet of the drying box 22, so that the material in the drying box 22 is lifted to the storage cup 3 against gravity to realize feeding.

[0052] In this embodiment, the negative pressure suction mechanism 20 is a vacuum pump. The inlet of the vacuum pump is divided into three independently controllable on / off branches. Technicians can choose different ways to control the on / off of each branch according to needs, and are not limited to the examples given in this embodiment. For example, a telescopic structure can also be provided in the first air suction pipeline 71, the second air suction pipeline 72 or the first back suction branch 61, and the on / off of the above gas pipelines is controlled by the expansion and contraction of the telescopic structure. As Figure 2 shown, the first switch 81, the second switch 82 and the third switch 83 are respectively cylinders, and the on / off of the first air suction pipeline 71, the second air suction pipeline 72 or the first back suction branch 61 is realized by the expansion and contraction of the piston rods of the respective cylinders. For example, the pipe joints corresponding to each gas pipeline can be blocked or unblocked.

[0053] In the preferred embodiment of the present utility model, such as Figure 4As shown in the figure, the box body of the drying oven 22 is provided with a first switch button 224 and a second switch button 225: the first switch button controls the opening and closing of the first switch member 81 and the negative pressure suction mechanism 20; the second switch button controls the opening and closing of the back suction switch valve 63. By pressing the first switch button and the second switch button, the negative pressure suction mechanism 20 can be controlled to start, the second back suction branch 62 can be unblocked, and the material can be back-sucked. The control method is simple and convenient.

[0054] In addition, the box body of the drying oven 22 is also provided with a third switch button 226 and a fourth switch button 227. The third switch button 226 controls the opening and closing of the second switch member 82 and the negative pressure suction mechanism 20; by pressing the third switch button 226, the material can be controlled to enter the heating cylinder 21 from the storage cylinder 1 for heating, so as to realize the feeding of the dryer 2. The fourth switch button 227 controls the opening and closing of the third switch member 83 and the negative pressure suction mechanism 20; by pressing the fourth switch button 227, the air in the storage cup 3 and the second suction pipeline 72 can be sucked, thereby generating negative pressure, so that the material in the heating cylinder 21 enters the storage cup 3, realizing feeding.

[0055] It should be noted that in this embodiment, when the connecting pipeline between two components is a solid line, it indicates that the material is flowing in the pipeline (or can be called a material pipeline). When the connecting pipeline between two components is a dotted line, it indicates that the gas is flowing in the pipeline, that is, negative pressure is formed by pumping air. In addition, the injection part 4, the injection molding machine 5, the storage cup 3 and the storage cylinder 1 are all common application forms in the art, and their specific structures can refer to the prior art, which will not be elaborated in this application.

[0056] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molding device, characterized in that, It includes a material storage barrel, a dryer, a material storage cup, an injection part and an injection molding machine that are sequentially connected through a material pipeline to form an injection molding flow path. The dryer includes a negative pressure suction mechanism for providing a driving force for the material to enter the material storage cup from the material storage barrel through the dryer; the negative pressure suction mechanism includes a first inlet. The material storage barrel includes a first gas outlet and a barrel inlet, and the molding equipment further includes: A first back suction branch connected between the first gas outlet of the material storage barrel and the first inlet of the negative pressure suction mechanism. A second back suction branch, the first end of the second back suction branch is connected to the material pipeline between the material storage cup and the injection part, and the second end of the second back suction branch is connected to the barrel inlet. A back suction switch valve is arranged on the second back suction branch for controlling the on or off of the second back suction branch.

2. The molding device according to claim 1, characterized in that, The first end of the second back suction branch is higher than the second end of the second back suction branch.

3. The molding device according to claim 1, characterized in that It further includes A first switch member arranged on the first back suction branch for controlling the on or off of the first back suction branch.

4. The molding device according to claim 3, characterized in that, The dryer further includes: A heating barrel and a drying box that are sequentially connected between the material outlet of the material storage barrel and the material inlet of the material storage cup; the negative pressure suction mechanism is arranged in the drying box. A hot air blower is arranged in the drying box.

5. The molding equipment according to claim 4, wherein The heating barrel has a second gas outlet. The negative pressure suction mechanism includes a second inlet, and the molding equipment further includes A first air extraction pipeline, the two ends of the first air extraction pipeline are respectively connected to the second gas outlet and the second inlet of the negative pressure suction mechanism. A second switch member is arranged on the first air extraction pipeline for controlling the on or off of the first air extraction pipeline.

6. The molding device according to claim 5, characterized in that, It further includes An optoelectronic sensor for detecting the amount of material in the material storage cup, and the optoelectronic sensor is electrically connected to the second switch member and the negative pressure suction mechanism.

7. The molding equipment according to claim 5, wherein The material storage cup has a third gas outlet. The negative pressure suction mechanism includes a third inlet, and the molding equipment further includes A second air extraction pipeline, the two ends of the second air extraction pipeline are respectively connected to the third gas outlet and the third inlet of the negative pressure suction mechanism. A third switch member is arranged on the second air extraction pipeline for controlling the on or off of the second air extraction pipeline.

8. The molding device according to claim 4, wherein The box body of the drying box is provided with: A first switch button for controlling the opening and closing of the first switch member and the power on and off of the negative pressure suction mechanism. A second switch button for controlling the opening and closing of the back suction switch valve.

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