Differential mold closing hydraulic oil way of vertical rubber injection machine

Abstract

The utility model discloses a differential mould closing hydraulic oil circuit of a vertical rubber injection machine, which comprises a main oil pump, an oil hydraulic cylinder and an oil tank, the oil hydraulic cylinder comprises a chamber I and a chamber II, the differential mould closing hydraulic oil circuit also comprises a one-way valve, a direction valve I and a direction valve II, the chamber II is communicated with the one-way valve through an oil circuit I, the chamber II is communicated with the direction valve II through an oil circuit II, and the direction valve I is communicated with the direction valve II through an oil circuit II. The first direction valve is communicated with the second direction valve through a third oil way, the first cavity is communicated with the first direction valve through a fourth oil way, the main oil pump is communicated with the first direction valve through a fifth oil way, the oil tank is communicated with the first direction valve through a sixth oil way, and the one-way valve is communicated with the fifth oil way through a seventh oil way. By means of the structure, the flow of oil flowing into the first cavity is increased, the speed that the piston drives the mold plate to move is increased, and the mold closing efficiency is improved. The power of the main oil pump and the motor does not need to be increased, the structure of the oil hydraulic cylinder does not need to be changed, and therefore the structure is simple, and improvement cost is low.

Description

Technical Field

[0001] The utility model relates to a rubber injection machine, in particular to a differential clamping hydraulic oil circuit of a vertical rubber injection machine. Background Art

[0002] The templates of ordinary rubber injection machines are clamped or unclamped by using an oil cylinder as the power. The oil cylinder is divided into chamber one and chamber two by a piston. When clamping, the main oil pump cooperates with the motor to pump oil from the oil tank into chamber one. The oil in chamber one pushes the piston to drive the template to clamp, and at the same time, the oil in chamber two flows back to the oil tank. When unclamping, the main oil pump cooperates with the motor to pump oil from the oil tank into chamber two. The oil in chamber two pushes the piston to drive the template to move in the reverse direction to unclamp, and at the same time, the oil in chamber one flows back to the oil tank.

[0003] In the above structure, we hope to improve the clamping efficiency without increasing the power of the main oil pump and the motor. Therefore, the applicant designs a differential clamping hydraulic oil circuit of a vertical rubber injection machine to meet the above requirements. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a differential clamping hydraulic oil circuit of a vertical rubber injection machine.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A differential clamping hydraulic oil circuit of a vertical rubber injection machine includes a main oil pump, an oil cylinder and an oil tank. The oil cylinder includes chamber one and chamber two. The characteristics are that: it further includes a one-way valve, a direction valve one and a direction valve two. Chamber two is communicated with the one-way valve through oil circuit one, chamber two is communicated with direction valve two through oil circuit two, direction valve one is communicated with direction valve two through oil circuit three, chamber one is communicated with direction valve one through oil circuit four, the main oil pump is communicated with direction valve one through oil circuit five, the oil tank is communicated with direction valve one through oil circuit six, and the one-way valve is communicated with oil circuit five through oil circuit seven.

[0007] A balance valve is provided on oil circuit four.

[0008] It further includes a system pressure valve. The system pressure valve is communicated with oil circuit seven through oil circuit eight, and the system pressure valve is communicated with the oil tank through a pipeline.

[0009] There are two oil cylinders. Chamber one of the two oil cylinders is communicated with oil circuit four; chamber two of the two oil cylinders is communicated with oil circuit two.

[0010] The beneficial effects of the present utility model are as follows: Through the control of the one-way valve and the directional valve II, when the mold is opened, the oil in the chamber II can flow into the oil passage VII and then merge into the oil passage V, and together with the oil pumped out by the main oil pump, it is pumped into the chamber I, thereby increasing the flow rate of the oil flowing into the chamber I, and also increasing the speed at which the piston drives the template to move, improving the efficiency of mold closing. The above structure does not require increasing the power of the main oil pump and the motor, nor changing the structure of the hydraulic cylinder, so it has a simple structure and low improvement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below with reference to the drawings and embodiments.

[0012] Figure 1 is the oil circuit schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The advantages and features of the present disclosure and its implementation methods will be clarified by the following embodiments described with reference to the drawings. However, the present disclosure can be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is only limited by the scope of the claims.

[0014] The shapes, sizes, proportions, angles, and numbers disclosed in the drawings used to describe the embodiments of the present disclosure are only examples, so the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of related known functions or configurations is determined to unnecessarily obscure the key points of the present disclosure, the detailed description will be omitted. When using "comprising", "having", and "including" described in this specification, unless "only" is used, other components can be added. Unless otherwise indicated, singular terms can include plural forms.

[0015] When interpreting elements, although not explicitly described, the elements are understood to include an error range.

[0016] When describing positional relationships, for example, when the positional relationship is described as "on...", "above...", "below...", and "adjacent to...", unless "immediately" or "directly" is used, one or more other parts can be arranged between the two other parts.

[0017] When describing temporal relationships, for example, when the temporal order is described as "after...", "subsequently", "next", and "before...", unless "exactly" or "directly" is used, discontinuous situations can be included.

[0018] It should be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the present disclosure.

[0019] As can be fully understood by those skilled in the art, the features of different embodiments of the present disclosure can be partially or fully coupled or combined with each other, and can cooperate with each other in various ways and be technically driven. The embodiments of the present disclosure can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0020] Referring to Figure 1 , the present utility model discloses a differential clamping hydraulic oil circuit of a vertical rubber injection machine, which includes a main oil pump 1, an oil pressure cylinder 2 and an oil tank 3. Among the above, the oil tank 3 is a storage element for storing oil; the oil pressure cylinder 2 is an executing element for driving the template to move, and the main oil pump 1 is a driving element for pumping oil from the oil tank 3 to the oil pressure cylinder 2. It also includes a check valve 4, a first direction valve 5 and a second direction valve 6. The check valve 4, the first direction valve 5 and the second direction valve 6 are all oil circuit control elements. The check valve 4 controls the oil to flow in a single direction, while the first direction valve 5 and the second direction valve 6 can control the oil to flow in multiple directions. The oil pressure cylinder 2 includes a chamber one 7 and a chamber two 8. The chamber two 8 is communicated with the check valve 4 through an oil circuit one 9, the chamber two 8 is communicated with the second direction valve 6 through an oil circuit two 10, the first direction valve 5 is communicated with the second direction valve 6 through an oil circuit three 11, the chamber one 7 is communicated with the first direction valve 5 through an oil circuit four 12, the main oil pump 1 is communicated with the first direction valve 5 through an oil circuit five 13, the oil tank 3 is communicated with the first direction valve 5 through an oil circuit six 14, and the check valve 4 is communicated with the oil circuit five 13 through an oil circuit seven 15.

[0021] The principle of the above oil circuit structure is as follows:

[0022] During the clamping process, the main oil pump 1 pumps oil from the oil tank 3, enters the first direction valve 5 through the oil circuit five 13. The first direction valve 5 controls the oil to enter the chamber one 7 through the oil circuit four 12, thereby pushing the piston and driving the template to move for clamping. At the same time, the oil in the chamber two 8 is extruded. The second direction valve 6 closes the oil circuit two 10. The extruded oil can only pass through the oil circuit one 9 and the check valve 4, and then the oil circuit seven 15 is merged into the oil circuit five 13. In this way, during the entire opening process, the oil in the chamber two 8 does not need to flow back to the oil tank 3, but is merged into the oil circuit five 13 and flows into the chamber one 7 together with the pumped oil to push the piston and drive the template to move for clamping. In this way, the amount of oil flowing into the chamber one 7 per unit time is increased, thereby increasing the speed of the piston driving the template to move and improving the clamping efficiency.

[0023] During mold opening, the main oil pump 1 pumps oil from the oil tank 3, and the oil enters the first directional valve 5 through the fifth oil circuit 13. The first directional valve 5 controls the oil to enter the second directional valve 6 through the third oil circuit 11. At this time, the second directional valve 6 opens the second oil circuit 10, so that the oil can enter the second oil circuit 10 through the second directional valve 6 until it reaches the second chamber 8. The oil in the second chamber 8 pushes the piston and drives the template to move in the reverse direction to achieve mold opening. At the same time, the oil in the first chamber 7 passes through the fourth oil circuit 12 and the first directional valve 5, and flows into the oil tank 3 through the sixth oil circuit 14 under the control of the first directional valve 5.

[0024] As shown in the figure, a balance valve 16 is provided on the fourth oil circuit 12 to achieve the balance of the oil pressure in the system. There is also a system pressure valve 17. The system pressure valve is connected to the seventh oil circuit 15 through the eighth oil circuit, and the system pressure valve is connected to the oil tank through a pipeline. The system pressure valve can control and adjust the oil pressure in the system. When the pressure is too high, the system pressure valve can discharge some oil into the oil tank to reduce the pressure.

[0025] As shown in the figure, there are two oil cylinders 2 in the system. The first chambers 7 of the two oil cylinders 2 are both connected to the fourth oil circuit 12; the second chambers 8 of the two oil cylinders 2 are both connected to the second oil circuit 10.

[0026] The differential clamping hydraulic oil circuit of a vertical rubber injection machine provided by the embodiments of the present invention has been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A differential clamping hydraulic oil circuit of a vertical rubber injection machine, comprising a main oil pump, a hydraulic cylinder and an oil tank, wherein the hydraulic cylinder comprises chamber 1 and chamber 2, and is characterized in that: It also includes a one-way valve, a directional valve 1 and a directional valve 2. The chamber 2 is connected to the one-way valve through the oil circuit 1, the chamber 2 is connected to the directional valve 2 through the oil circuit 2, the directional valve 1 is connected to the directional valve 2 through the oil circuit 3, the chamber 1 is connected to the directional valve 1 through the oil circuit 4, the main oil pump is connected to the directional valve 1 through the oil circuit 5, the oil tank is connected to the directional valve 1 through the oil circuit 6, and the one-way valve is connected to the oil circuit 5 through the oil circuit 7.

2. The differential clamping hydraulic oil circuit of a vertical rubber injection molding machine according to claim 1, characterized in that: A balancing valve is provided on the oil circuit 4.

3. The differential clamping hydraulic oil circuit of a vertical rubber injection molding machine according to claim 1, characterized in that: It also includes a system pressure valve, which is connected to the oil circuit 7 through the oil circuit 8, and the system pressure valve is connected to the oil tank through a pipeline.

4. The differential clamping hydraulic oil circuit of a vertical rubber injection molding machine according to claim 1, characterized in that: There are two hydraulic cylinders, and the chambers 1 of the two hydraulic cylinders are both connected to the oil circuit 4; the chambers 2 of the two hydraulic cylinders are both connected to the oil circuit 2.

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