Injection mold inner cavity spraying device

Abstract

The utility model is suitable for the technical field of injection molding, and provides an injection mold inner cavity spraying device which comprises an injection head, a connecting head fixedly connected to the top of the injection head, and a conveying pipe fixedly connected to the top of the connecting head. A heat conduction copper pipe is arranged in the injection head, and a spiral heating pipe is arranged between the heat conduction copper pipe and the injection head. According to the inner cavity spraying device of the injection mold, the heat conduction copper pipe, the heating pipe and the heat insulation pad are arranged, so that the purpose of continuously heating liquid plastic in the device is achieved, the situation that when the device stops running, the liquid plastic is solidified in the injection head, and consequently the injection head is blocked is avoided, and the service life of the injection mold is prolonged. The problems that although an existing injection mold inner cavity spraying device can inject liquid plastic into a mold, the interior of the injection mold inner cavity spraying device does not have a heating function, so that when the device stops running, the liquid plastic in the device is likely to be solidified in the device, and the device is blocked are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding, and particularly relates to an injection mold inner cavity injection device. Background Art

[0002] It is generally known that an injection molding machine injects liquid plastic into a mold through an injection device to form finished products of various shapes.

[0003] Although the existing injection mold cavity injection device can inject liquid plastic into the interior of the mold, it does not have a heating function inside. As a result, when the device stops running, the liquid plastic inside the device is easy to solidify inside it, causing the device to be blocked. Utility Model Content

[0004] The utility model provides an injection mold inner cavity injection device, aiming to solve the problem that although the existing injection mold inner cavity injection device can inject liquid plastic into the interior of the mold, the interior thereof does not have a heating function, resulting in that when the device stops running, the liquid plastic inside the device is easy to solidify inside the device, causing the device to be blocked.

[0005] The utility model is implemented as follows: an injection mold inner cavity injection device comprises: an injection head, a connecting head is fixedly connected to the top of the injection head, a delivery pipe is fixedly connected to the top of the connecting head; a heat-conducting copper tube is arranged inside the injection head, a spiral heating tube is arranged between the heat-conducting copper tube and the injection head, the heat-conducting copper tube is fixedly connected to the injection head, the heating tube is fixedly connected to the heat-conducting copper tube, and a heat insulation pad is fixedly connected to the outer surface of the injection head; an elastic mechanism is arranged inside the heat-conducting copper tube to prevent the liquid plastic in the injection head from continuing to be injected into the mold cavity due to gravity when the feeding is stopped.

[0006] Preferably, the elastic mechanism includes: a limiting cylinder is arranged inside the heat-conducting copper tube, a limiting slide is slidably connected inside the limiting cylinder, a connecting rod is fixedly connected at the bottom center of the limiting slide, and a sealing plate is fixedly connected to the bottom of the connecting rod; a fixing plate is arranged on the top of the sealing plate, the fixing plate is fixedly connected to the heat-conducting copper tube, and a feeding port is opened on the fixing plate near the connecting rod.

[0007] Preferably, both sides of the limiting cylinder are fixedly connected with hollow tubes, and one end of the hollow tube away from the limiting cylinder passes through the heat-conducting copper tube and the injection head and extends to the outside of the injection head.

[0008] Preferably, sliders are fixedly connected to both sides of the limiting slide, matching slide grooves are provided near the limiting cylinders, the sliders are slidably connected to the slide grooves, and two through holes are provided inside the limiting slide.

[0009] Preferably, a spring is provided between the limiting slide plate and the limiting cylinder, and the spring is sleeved on the outer surface of the connecting rod.

[0010] Preferably, a first sealing ring is sleeved on the outer surface of the connecting rod near the limiting cylinder, the first sealing ring is fixedly connected to the limiting cylinder, a second sealing ring is arranged between the sealing plate and the fixing plate, and the second sealing ring is fixedly connected to the sealing plate.

[0011] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0012] By arranging a heat-conducting copper tube, a heating tube and a heat-insulating pad, the purpose of continuously heating the liquid plastic inside the device is achieved, and the situation that the liquid plastic solidifies inside the injection head when the device stops running, causing the injection head to be blocked, is avoided. The problem that although the existing injection mold inner cavity injection device can inject liquid plastic into the mold, it does not have a heating function inside, resulting in the liquid plastic inside the device easily solidifying inside when the device stops running, causing the device to be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 The utility model Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 The utility model Figure 1 Enlarged view of point B in the middle;

[0016] Figure 4 This is a connection diagram of the sealing block and the second sealing ring of the utility model.

[0017] In the figure: 1. injection head; 2. connecting head; 3. conveying pipe; 4. heat-conducting copper pipe; 5. heating pipe; 6. thermal insulation pad; 7. elastic mechanism; 8. limiting cylinder; 9. limiting slide plate; 10. connecting rod; 11. sealing plate; 12. fixing plate; 13. feeding port; 14. hollow pipe; 15. slider; 16. slide groove; 17. through hole; 18. spring; 19. first sealing ring; 20. second sealing ring. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The utility model embodiment provides an injection mold cavity injection device, such as Figure 1-4 As shown, it includes: an injection head 1, a connecting head 2 is fixedly connected to the top of the injection head 1, and a conveying pipe 3 is fixedly connected to the top of the connecting head 2; a heat-conducting copper tube 4 is arranged inside the injection head 1, a spiral heating tube 5 is arranged between the heat-conducting copper tube 4 and the injection head 1, the heat-conducting copper tube 4 is fixedly connected to the injection head 1, the heating tube 5 is fixedly connected to the heat-conducting copper tube 4, and a heat-insulating pad 6 is fixedly connected to the outer surface of the injection head 1; an elastic mechanism 7 is arranged inside the heat-conducting copper tube 4 to prevent the liquid plastic in the injection head 1 from continuing to be injected into the mold cavity due to gravity when the feeding is stopped.

[0021] It should be noted that, when the heating tube 5 is started, the temperature generated by the heating tube 5 is conducted to the liquid plastic inside the injection head 1 by the heat-conducting copper tube 4, thereby heating the liquid plastic, thereby preventing the liquid plastic from solidifying inside the injection head 1 when the device stops running, causing blockage of the injection head 1, and achieving the purpose of continuously heating the liquid plastic inside the device. This avoids the situation where the liquid plastic solidifies inside the injection head when the device stops running, causing blockage of the injection head 1. This solves the problem that although the existing injection mold inner cavity injection device can inject liquid plastic into the mold, it does not have a heating function inside, resulting in the liquid plastic inside the device easily solidifying inside when the device stops running, causing blockage of the device.

[0022] In a further preferred embodiment of the present invention, Figure 3As shown, the elastic mechanism 7 includes: a limiting cylinder 8 is arranged inside the heat-conducting copper tube 4, a limiting slide plate 9 is slidably connected inside the limiting cylinder 8, a connecting rod 10 is fixedly connected at the bottom center of the limiting slide plate 9, and a sealing plate 11 is fixedly connected to the bottom of the connecting rod 10; a fixing plate 12 is arranged on the top of the sealing plate 11, the fixing plate 12 is fixedly connected to the heat-conducting copper tube 4, and a feeding port 13 is opened on the fixing plate 12 near the connecting rod 10.

[0023] In this embodiment, when the injection molding machine injects liquid plastic into the injection head 1 through the delivery pipe 3 and the connecting head 2, the liquid plastic pushes the sealing plate 11, so that the sealing plate 11 is separated from the fixed plate 12, and then flows into the interior of the injection mold through the gap between the sealing plate 11 and the fixed plate 12. When the injection molding machine stops running, the limit slide 9 slides upward to reset. While sliding, the limit slide 9 drives the connecting rod 10, and the connecting rod 10 drives the sealing plate 11, so that the sealing plate 11 moves to the fixed plate 12, thereby sealing the injection head 1, thereby preventing the liquid plastic in the injection head 1 from continuing to be injected into the mold cavity due to gravity when the feeding is stopped.

[0024] In a further preferred embodiment of the present invention, Figure 1 , 3 As shown, both sides of the limiting cylinder 8 are fixedly connected with hollow tubes 14 , and one end of the hollow tube 14 away from the limiting cylinder 8 penetrates the heat-conducting copper tube 4 and the injection head 1 and extends to the outside of the injection head 1 .

[0025] In this embodiment, the air pressure inside the limiting cylinder 8 can be balanced, so that the limiting slide plate 9 can slide flexibly inside the limiting cylinder 8 .

[0026] In a further preferred embodiment of the present invention, Figure 3 , 4 As shown, sliders 15 are fixedly connected to both sides of the limiting slide 9, and matching slide grooves 16 are provided in the limiting cylinder 8 near the sliders 15. The sliders 15 are slidably connected to the slide grooves 16, and two through holes 17 are provided inside the limiting slide 9.

[0027] In this embodiment, the moving stroke of the limiting slide plate 9 can be limited, thereby achieving the purpose of limiting the moving stroke of the sealing plate 11.

[0028] In a further preferred embodiment of the present invention, Figure 1 As shown, a spring 18 is provided between the limiting slide plate 9 and the limiting cylinder 8 , and the spring 18 is sleeved on the outer surface of the connecting rod 10 .

[0029] In this embodiment, when the liquid plastic in the injection head 1 stops feeding, the limit slide 9 can be pushed to slide upward for reset, so that the limit slide 9 drives the connecting rod 10, and the connecting rod 10 drives the sealing plate 11, thereby achieving the purpose of sealing the injection head 1.

[0030] In a further preferred embodiment of the present invention, Figure 1 , 4 As shown, a first sealing ring 19 is sleeved on the outer surface of the connecting rod 10 near the limiting cylinder 8, and the first sealing ring 19 is fixedly connected to the limiting cylinder 8. A second sealing ring 20 is arranged between the sealing plate 11 and the fixing plate 12, and the second sealing ring 20 is fixedly connected to the sealing plate 11.

[0031] In this embodiment, the sealing performance at the connection between the connecting rod 10 and the limiting cylinder 8 and at the contact between the sealing plate 11 and the fixing plate 12 is improved.

[0032] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0033] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0034] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0035] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. Injection mold cavity injection device, including: An injection head (1), the top of the injection head (1) being fixedly connected to a connecting head (2), and the top of the connecting head (2) being fixedly connected to a delivery pipe (3); The invention is characterized in that a heat-conducting copper tube (4) is arranged inside the injection head (1), a spiral heating tube (5) is arranged between the heat-conducting copper tube (4) and the injection head (1), the heat-conducting copper tube (4) is fixedly connected to the injection head (1), the heating tube (5) is fixedly connected to the heat-conducting copper tube (4), and a heat-insulating pad (6) is fixedly connected to the outer surface of the injection head (1); The interior of the heat-conducting copper tube (4) is provided with an elastic mechanism (7) for preventing the liquid plastic in the injection head (1) from continuing to be injected into the mold cavity due to gravity when the feeding is stopped.

2. The injection mold cavity injection device according to claim 1, characterized in that: The elastic mechanism (7) comprises: A limiting cylinder (8) is arranged inside the heat-conducting copper tube (4), a limiting slide plate (9) is slidably connected inside the limiting cylinder (8), a connecting rod (10) is fixedly connected at the bottom center of the limiting slide plate (9), and a sealing plate (11) is fixedly connected at the bottom of the connecting rod (10); A fixing plate (12) is arranged on the top of the sealing plate (11), the fixing plate (12) is fixedly connected to the heat-conducting copper tube (4), and a material delivery port (13) is provided on the fixing plate (12) near the connecting rod (10).

3. The injection mold cavity injection device according to claim 2, characterized in that: Hollow tubes (14) are fixedly connected to both sides of the limiting cylinder (8), and one end of the hollow tube (14) away from the limiting cylinder (8) passes through the heat-conducting copper tube (4) and the injection head (1) and extends to the outside of the injection head (1).

4. The injection mold cavity injection device according to claim 2, characterized in that: Slide blocks (15) are fixedly connected to both sides of the limiting slide plate (9), and matching slide grooves (16) are provided on the limiting cylinder (8) near the slide blocks (15). The slide blocks (15) are slidably connected to the slide grooves (16), and two through holes (17) are provided inside the limiting slide plate (9).

5. The injection mold cavity injection device according to claim 2, characterized in that: A spring (18) is provided between the limiting slide plate (9) and the limiting cylinder (8), and the spring (18) is sleeved on the outer surface of the connecting rod (10).

6. The injection mold cavity injection device according to claim 2, characterized in that: A first sealing ring (19) is sleeved on the outer surface of the connecting rod (10) near the limiting cylinder (8), and the first sealing ring (19) is fixedly connected to the limiting cylinder (8). A second sealing ring (20) is provided between the sealing plate (11) and the fixing plate (12), and the second sealing ring (20) is fixedly connected to the sealing plate (11).

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