Foaming agent injection device based on multi-head pump

Abstract

The utility model discloses a foaming agent injection device based on a multi-head pump, which comprises a first injection pump and a second injection pump, and further comprises a power unit for driving the first injection pump and the second injection pump to move simultaneously, and the power unit drives the first injection pump and the second injection pump to move simultaneously. The first injection pump and the second injection pump move in a crossed manner to always keep one of the first injection pump and the second injection pump in a high-pressure injection stroke, and the inlet ends of the first injection pump and the second injection pump are connected through a first branch pipe and are connected with a feeding pipe; the outlet ends of the first injection pump and the second injection pump are connected through a second branch pipe and are connected with a discharge pipe; one of the first injection pump and the second injection pump is always kept in a high-pressure injection stroke through crossed movement, so that the problem that injection is not coherent due to the fact that only one stroke of piston type movement exists in the injection stroke and injection time intervals exist in the injection stroke is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of foaming agent injection, in particular to a foaming agent injection device based on a multi-head pump. Background Art

[0002] Foamed polymers have many advantages, such as high strength, low weight, impact resistance, heat insulation, etc. Foamed products can be manufactured by an injection molding machine or an extrusion molding machine. For example, a polymer material is mixed with a foaming agent to form a mixture, and then force or pressure is applied to the mixture to inject or extrude the mixture into the cavity of a mold, and the mixture is foamed and cooled in the cavity to form a foamed product. However, the injection of the existing single-head injection pump is a piston movement, and only one stroke is the injection stroke, so there will be an injection time gap, resulting in discontinuous injection. Content of the Utility Model

[0003] To solve the defect that the injection of the existing single-head injection pump is a piston movement and only one stroke is the injection stroke, resulting in an injection time gap and discontinuous injection in the prior art, the utility model provides a foaming agent injection device based on a multi-head pump.

[0004] To solve the above technical problems, the utility model provides the following technical solutions:

[0005] A foaming agent injection device based on a multi-head pump of the utility model includes a first injection pump and a second injection pump, and further includes a power unit for driving the first injection pump and the second injection pump to move simultaneously. The power unit drives the first injection pump and the second injection pump to move simultaneously, and the first injection pump and the second injection pump perform crosswise activities, and always keep one of the first injection pump and the second injection pump in a high-pressure injection stroke. The inlet ends of the first injection pump and the second injection pump are connected by a first branch pipe and are connected to a feed pipe, and the outlet ends of the first injection pump and the second injection pump are connected by a second branch pipe and are connected to a discharge pipe.

[0006] As a preferred technical solution of the utility model, a pressure gauge for detecting the internal air pressure of the discharge pipe is provided on the discharge pipe.

[0007] As a preferred technical solution of the utility model, a flow meter for detecting the internal air pressure flow of the discharge pipe is provided on the discharge pipe.

[0008] As a preferred technical solution of the utility model, valves are provided at both ends of the first injection pump (1) and the second injection pump.

[0009] As a preferred technical solution of the utility model, a pressure regulating mechanism is provided on the discharge pipe (7).

[0010] As a preferred technical solution of the present utility model, the pressure regulating mechanism includes a connecting pipe connected to the discharge pipe, and an adjusting tank is provided in the connecting pipe, and a piston block moving along the inner cavity of the adjusting tank is provided in the adjusting tank, and an adjusting airbag with a certain air pressure is provided inside the adjusting tank.

[0011] The beneficial effects of the present utility model are:

[0012] In this foaming agent injection device based on a multi-head pump, the power unit is used to synchronously drive the first injection pump and the second injection pump to move simultaneously. Such that the first injection pump and the second injection pump perform crosswise activities, and always keep one of the first injection pump and the second injection pump in the high-pressure injection stroke, thereby solving the problem that in the piston-type movement, only one stroke is the injection stroke, which will result in an injection time gap, thus causing discontinuous injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural diagram of a foaming agent injection device based on a multi-head pump of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the adjusting tank d of a foaming agent injection device based on a multi-head pump of the present utility model.

[0016] In the figure: 1, the first injection pump; 2, the second injection pump; 3, the power unit; 4, the first branch pipe; 5, the feed pipe; 6, the second branch pipe; 7, the discharge pipe; 8, the flow meter; 9, the pressure gauge; 10, the valve; 11, the connecting pipe; 12, the adjusting tank; 13, the piston block; 14, the adjusting airbag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0018] Embodiment: As Figure 1 and Figure 2As shown in the figure, a foaming agent injection device based on a multi-head pump of the present utility model includes a first injection pump 1 and a second injection pump 2, and further includes a power unit 3 that drives the first injection pump 1 and the second injection pump 2 to move simultaneously. The power unit drives the first injection pump 1 and the second injection pump 2 to move simultaneously, and the first injection pump 1 and the second injection pump 2 perform crosswise activities to always keep one of the first injection pump 1 and the second injection pump 2 in a high-pressure injection stroke. The inlet ends of the first injection pump 1 and the second injection pump 2 are connected through a first branch pipe 4 and are connected to a feed pipe 5, and the outlet ends of the first injection pump 1 and the second injection pump 2 are connected through a second branch pipe 6 and are connected to a discharge pipe 7. The power unit 3 is used to synchronously drive the first injection pump 1 and the second injection pump 2 to move simultaneously. In this way, the first injection pump 1 and the second injection pump 2 perform crosswise activities to always keep one of the first injection pump 1 and the second injection pump 2 in a high-pressure injection stroke, thereby solving the problem that in piston motion, only one stroke is the injection stroke, resulting in an injection time gap and causing discontinuous injection.

[0019] Among them, a pressure gauge 9 for detecting the internal air pressure of the discharge pipe 7 is provided on the discharge pipe 7, and a flow meter 8 for detecting the internal flow rate of the discharge pipe 7 is provided on the discharge pipe 7.

[0020] Among them, valves 10 are provided at both ends of the first injection pump 1 and the second injection pump 2.

[0021] Among them, a pressure regulating mechanism is provided on the discharge pipe 7.

[0022] Among them, the pressure regulating mechanism includes a connecting pipe 11 connected to the discharge pipe 7. An adjusting tank 12 is provided in the connecting pipe 11. A piston block 13 that moves along the inner cavity of the adjusting tank 12 is provided in the adjusting tank 12, and an adjusting airbag 14 with a certain air pressure is provided inside the adjusting tank 12. When there are pressure fluctuations in the discharge pipe 7, the expansion and contraction of the air pressure are used to adjust the volume of the adjusting tank 12, and further adjust the internal pressure of the discharge pipe 7, thereby ensuring greater stability.

[0023] During operation, for this foaming agent injection device based on a multi-head pump, the power unit 3 is used to synchronously drive the first injection pump 1 and the second injection pump 2 to move simultaneously. In this way, the first injection pump 1 and the second injection pump 2 perform crosswise activities to always keep one of the first injection pump 1 and the second injection pump 2 in a high-pressure injection stroke, thereby solving the problem that in piston motion, only one stroke is the injection stroke, resulting in an injection time gap and causing discontinuous injection.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A foaming agent injection device based on a multi-head pump, characterized in that: The invention comprises a first injection pump (1) and a second injection pump (2), and also comprises a power unit (3) for driving the first injection pump (1) and the second injection pump (2) to move simultaneously, wherein the power unit drives the first injection pump (1) and the second injection pump (2) to move simultaneously, and the first injection pump (1) and the second injection pump (2) perform cross-type activities to always keep one of the first injection pump (1) and the second injection pump (2) in a high-pressure injection stroke, and the inlet ends of the first injection pump (1) and the second injection pump (2) are connected via a first branch pipe (4) and connected to a feed pipe (5), and the outlet ends of the first injection pump (1) and the second injection pump (2) are connected via a second branch pipe (6) and connected to a discharge pipe (7).

2. A foaming agent injection device based on a multi-head pump according to claim 1, characterized in that: The discharge pipe (7) is provided with a pressure gauge (9) for detecting the internal air pressure of the discharge pipe (7).

3. A foaming agent injection device based on a multi-head pump according to claim 1, characterized in that: The discharge pipe (7) is provided with a flow meter (8) for detecting the internal flow of the discharge pipe (7).

4. A foaming agent injection device based on a multi-head pump according to claim 2, characterized in that: Valves (10) are provided at both ends of the first injection pump (1) and the second injection pump (2).

5. The foaming agent injection device based on a multi-head pump according to claim 1, characterized in that: The discharge pipe (7) is provided with a pressure regulating mechanism.

6. A foaming agent injection device based on a multi-head pump according to claim 5, characterized in that: The pressure regulating mechanism comprises a connecting pipe (11) connected to a discharge pipe (7), a regulating tank (12) is arranged inside the connecting pipe (11), a piston block (13) is arranged inside the regulating tank (12) and moves along the inner cavity of the regulating tank (12), and a regulating air bag (14) with a certain air pressure is arranged inside the regulating tank (12).

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