A kind of quick mold cylinder of vertical injection molding machine

Abstract

The present invention discloses a quick mold cylinder of a vertical injection molding machine, comprising a cylinder body, wherein at least one oil storage chamber and a mold locking chamber are formed in the cylinder body, the oil storage chamber and the mold locking chamber are communicated with each other, and the mold locking chamber is provided with an oil hole three; an oil storage cylinder core shaft passing through the cylinder body is provided in the oil storage chamber, and the end of the oil storage cylinder core shaft divides the oil storage chamber into two independent upper chambers and a lower chamber, the lower chamber is communicated with the mold locking chamber, and the upper chamber is provided with a through hole communicated with the outside; a quick cylinder core shaft is fixedly provided in the mold locking chamber, and the outer peripheral sleeve of the quick cylinder core shaft is provided with A locking rod extends out of the cylinder body, and the interior of the locking rod and the end of the quick cylinder core shaft form a quick cylinder cavity, the quick cylinder cavity is provided with an oil hole 1, the inner wall of the locking rod and the outer wall of the quick cylinder core shaft form an oil filling cavity, and the quick cylinder core shaft is provided with an oil hole 2. In the present invention, the oil storage chamber acts as an auxiliary oil tank, that is, it can store oil when the mold is opened, and can output oil when the mold is closed. There is no need for an external auxiliary oil tank, which makes the overall volume smaller, and at the same time can realize the internal circulation of the oil in the cylinder body, shorten the oil transportation path, and make the action response of the oil storage cylinder core shaft and the locking rod faster.

Description

Technical Field

[0001] The invention belongs to the technical field of power devices, in particular to a quick mold cylinder for a vertical injection molding machine. Background Art

[0002] Vertical injection molding machines basically use hydraulic cylinders as power units in the process of opening and closing molds. Usually, an additional auxiliary oil tank is required to store oil and provide oil circulation for the hydraulic cylinder. This will make the overall power unit large in size and the circulation path long, causing delayed action. Of course, there is a fast oil cylinder on the market that can achieve a fast response effect, but it still cannot get rid of the auxiliary oil tank, and the force generated is also very limited, which is only suitable for small injection molding machines. Summary of the invention

[0003] The object of the present invention is to provide a rapid mold cylinder for a vertical injection molding machine to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A vertical injection molding machine rapid mold cylinder, comprising a cylinder body, wherein at least one oil storage chamber and a mold locking chamber are formed in the cylinder body, the oil storage chamber and the mold locking chamber are communicated with each other, and the mold locking chamber is provided with an oil hole three;

[0006] The oil storage chamber is provided with an oil storage cylinder core shaft passing through the cylinder body, and the end of the oil storage cylinder core shaft divides the oil storage chamber into two independent upper chambers and a lower chamber, the lower chamber is connected with the clamping chamber, and the upper chamber is provided with a through hole connected with the outside;

[0007] A quick cylinder core shaft is fixedly arranged in the locking cavity, a locking rod extending out of the cylinder body is sleeved on the outer periphery of the quick cylinder core shaft, a quick cylinder cavity is formed inside the locking rod and the end of the quick cylinder core shaft, an oil hole 1 is arranged in the quick cylinder cavity, an oil filling cavity is formed by the inner wall of the locking rod and the outer wall of the quick cylinder core shaft, and the quick cylinder core shaft is provided with an oil hole 2.

[0008] According to a further technical solution, there are two oil storage chambers, each of which is provided with an oil storage cylinder core shaft passing through the cylinder body.

[0009] According to a further technical solution, the flow channel formed between the lower chamber and the clamping chamber is in an inverted "C" shape.

[0010] According to a further technical solution, one end of the quick cylinder core shaft is fixed to the upper end of the cylinder body, and the other end extends into the clamping cavity. An oil injection channel is provided in the quick cylinder core shaft, and the oil injection channel is connected to the second oil hole.

[0011] According to a further technical solution, the locking rod is located at one end of the locking chamber and is provided with a supporting portion extending toward the side wall of the locking chamber, a groove is provided at the lower part of the locking chamber, the flow channel is connected to the groove, and the oil hole three includes hole one and hole two corresponding to the locking chamber and the groove respectively.

[0012] According to a further technical solution, the cylinder body forms a support frame, and the support frame is provided with a plurality of holes for installing guide pillars.

[0013] Beneficial effects of the present invention:

[0014] In the present invention, the oil storage chamber acts as an auxiliary oil tank, that is, it can store oil when the mold is opened, and can output oil when the mold is closed. There is no need for an external auxiliary oil tank, which makes the overall volume smaller. At the same time, it can realize the internal circulation of oil in the cylinder body, shorten the oil transportation path, and make the action response of the oil storage cylinder core shaft and the locking rod faster.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : A three-dimensional structural diagram of the present invention.

[0017] Figure 2 : A plan view of the structure of the present invention.

[0018] Figure 3 : Axial cross-sectional view of the present invention.

[0019] Figure 4 : The present invention Figure 3 Enlarged view of part A.

[0020] Figure 5 : Radial cross-sectional view of the present invention.

[0021] Figure 6 : Schematic diagram of the action of the present invention.

[0022] Figure markings: 1-cylinder body, 2-oil storage chamber, 21-upper chamber, 22-lower chamber, 23-through hole, 24-oil storage cylinder core shaft, 31-locking chamber, 32-hole one, 33-hole two, 34-slot, 41-quick cylinder core shaft, 421-locking rod, 422-supporting part, 43-quick cylinder cavity, 44-oil hole one, 45-oil filling chamber, 46-oil hole two, 47-oil injection channel, 48-flow channel, 5-upper template. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Please refer to Figure 1-6;

[0025] The mold cylinder described in the present invention has the advantages of small size and rapid response. First of all, it should be explained that the mold cylinder described in the present invention is installed on the upper part of the vertical injection molding machine, and the output end is connected to the upper mold plate 5; it specifically includes a cylinder body 1, and the cylinder body 1 in this embodiment can be an integrally formed structure, or a structure assembled from multiple parts, as long as the airtight effect can be achieved, it is not limited here; at least one oil storage chamber 2 and a clamping chamber 31 are formed in the cylinder body 1, the oil storage chamber 2 and the clamping chamber 31 are connected to each other, and the clamping chamber 31 is provided with an oil hole 3;

[0026] An oil storage cylinder core shaft 24 passing through the cylinder body 1 is provided in the oil storage chamber 2. The oil storage cylinder core shaft 24 includes a rod body and a piston. The piston is in close contact with the inner wall of the oil storage chamber 2, and the oil storage chamber 2 is divided into two independent upper chambers 21 and lower chambers 22. The lower chamber 22 is connected to the clamping chamber 31. The upper chamber 21 is provided with a through hole 23 connected to the outside, and the rod body passes through the cylinder body 1. Of course, a sealing structure is also provided at the contact between the rod body and the cylinder body 1 to avoid oil leakage.

[0027] A quick cylinder core shaft 41 is fixedly provided in the locking chamber 31, and a locking rod 421 extending from the cylinder body 1 is sleeved on the outer periphery of the quick cylinder core shaft 41. In the present embodiment, a piston is provided at the end of the quick cylinder core shaft 41, and the piston is in close contact with the inner wall of the locking rod 421, so that the interior of the locking rod 421 and the end of the quick cylinder core shaft 41 form a quick cylinder cavity 43, and the quick cylinder cavity 43 is provided with an oil hole 1 44, and a sealing structure is also provided between the end face of the locking rod 421 and the quick cylinder core shaft 41, and the axial diameter of the quick cylinder core shaft 41 is smaller than the aperture of the internal space of the locking rod 421, so that the inner wall of the locking rod 421 and the outer wall of the quick cylinder core shaft 41 form an oil filling cavity 45, and the quick cylinder core shaft 41 is provided with an oil hole 2 46, and the oil hole 2 46 is connected to an external oil pump.

[0028] A first embodiment based on the above structure;

[0029] In this embodiment, the through hole 23 opened on the upper chamber 21 is connected to the outside air; the initial state is in the contracted state, at this time, the space between the upper chamber 21 and the quick cylinder cavity 43 is in the minimum state, and the space between the lower chamber 22 and the oil filling cavity 45 is in the maximum state; in this embodiment, the lower chamber 22 is relatively small, that is, the oil storage capacity is relatively small; when the mold is required to be closed, the external oil pump injects hydraulic oil into the quick cylinder cavity 43 to make the clamping rod 421 move downward, and at the same time, the hydraulic oil in the oil filling cavity is pressed out; as the clamping rod 421 moves downward, the volume occupied by the clamping rod 421 located in the clamping cavity 31 becomes smaller and smaller, at this time, negative pressure is generated in the clamping cavity 31 and the hydraulic oil of the lower chamber 22 is sucked over, so that the oil storage cylinder core shaft 24 has the power to move downward, and under the double superposition of the negative pressure generated by the clamping cavity 31 and the downward force generated by the quick cavity, a rapid mold closing action is achieved;

[0030] At the same time, internal circulation of the lower chamber and the clamping chamber 31 is realized without the need to set up an auxiliary oil tank for auxiliary pressurization, which greatly reduces the volume.

[0031] Preferably, when the maximum stroke of the mold closing is reached, the supporting portion 422 is placed at the bottom of the clamping chamber 31, and the bottom surface of the supporting portion 422 is in contact with the bottom surface of the clamping chamber 31. At this time, the side surface of the supporting portion 422 blocks the flow channel 48, so that the hydraulic oil in the clamping chamber 31 cannot flow into the lower chamber 22. At this time, the force exerted by the hydraulic oil in the clamping chamber 31 is all concentrated on the upper end surface of the supporting portion, and overlaps with the downward force exerted by the fast cylinder cavity 43, thereby generating a huge clamping force.

[0032] It should be noted that the downward force exerted on the supporting portion 422 by the clamping chamber 31 is smaller than the downward force exerted on the fast cylinder cavity 43;

[0033] When opening the mold, hydraulic oil is injected into the oil filling chamber 45, and the hydraulic oil in the quick cylinder chamber 43 is extracted. At this time, the quick cylinder chamber 43 will generate negative pressure and thus generate an upward force, which is superimposed on the upward force generated in the oil filling chamber 45, thereby pushing the locking rod 421 to move upward; further, since the hydraulic oil in the quick cylinder chamber 43 applies a downward force to the supporting part 422, the force that pushes the locking rod 421 to move upward needs to offset the downward force applied to the supporting part 422. Therefore, at the beginning of the movement, the upper template 5 moves very slowly, just to realize the slow opening operation of the front section of the mold. After the supporting part 422 moves upward for a distance, the flow channel 48 is opened, so that the locking chamber 31 is connected with the lower chamber 22. At this time, the force applied to the supporting part 422 disappears, leaving only the upward force applied to the locking rod 421, and the operation of rapid mold opening is realized.

[0034] Further explanation, hole 1 and hole 2 are provided on the outer side of the cylinder body 1 for replenishing hydraulic oil, and hole 1 and hole 2 are connected. In the initial state, there is a gap between the supporting part 422 and the outer wall of the clamping chamber 31, which can allow the hydraulic oil to flow, and a groove 34 adapted to the supporting part 422 is provided at the bottom of the clamping chamber 31. When the supporting part 422 is about to be combined with the groove 34, the hydraulic oil in the groove cannot be discharged, resulting in difficulty in fitting. In this embodiment, hole 2 33 corresponds to groove 34, and hole 1 32 is located above hole 2 33. When the supporting part 422 enters the groove 34, the hydraulic oil in the groove 34 flows out from hole 2 33, and then flows back from hole 1 32 into the clamping chamber 31, forming a cycle.

[0035] The size of the hole 1 32 and the hole 2 33 is also related to the descending speed of the supporting part 422 and the clamping rod 421. When the supporting part 422 enters the groove 34 relatively slowly, it corresponds to the buffer stage of the mold closing.

[0036] Based on the above structure, the second embodiment;

[0037] In this embodiment, the through hole 23 opened on the upper chamber 21 is connected to the outside air; the initial state is the contracted state, at this time, the space between the upper chamber 21 and the fast cylinder cavity 43 is in the minimum state, and the space between the lower chamber 22 and the oil inlet cavity 45 is in the maximum state; in this embodiment, the external port of the oil injection channel 47 is connected with a pipeline, and then connected to the oil hole 44 through an oil pump, and the hydraulic oil in the oil inlet cavity 45 is extracted by the oil pump and injected into the fast cylinder cavity 43 at the same time, that is, the volume of the oil inlet cavity 45 is continuously reduced, while the volume of the fast cylinder cavity 43 is continuously increased, so as to realize the internal oil circulation and further reduce the volume. The specific mold closing and mold opening process can refer to the first embodiment.

[0038] A second embodiment based on the above structure is a further extension of the first embodiment.

[0039] In this embodiment, the through hole 23 provided on the upper chamber 21 is connected to the oil pump. During the operation of the first embodiment, the upper chamber 21 and the lower chamber 22 are both filled with oil. When the mold needs to be closed, the oil is pumped out from the clamping chamber 31 and the oil filling chamber 45 by the oil pump, and the pumped oil is input into the upper chamber 21 and the fast cylinder cavity 43. At this time, the upper chamber 21 will apply a downward thrust to the oil storage cylinder core shaft 24, thereby improving the response speed of the mold closing.

[0040] When the mold is opened when needed, the oil pump will draw oil from the upper chamber 21 and the fast cylinder cavity 43 again. Due to the reduction of oil volume in the upper chamber 21 and the fast cylinder cavity 43, negative pressure is generated, and the oil storage cylinder core shaft 24 and the locking rod 421 are pushed up through the atmospheric pressure in disguise. At the same time, the oil pump injects oil into the locking chamber 31 and the oil filling chamber 45, so that the oil pressure in the oil filling chamber 45 and the lower chamber 22 increases, and the oil storage cylinder core shaft 24 and the locking rod 421 rise. The combination of the above two ends enables the oil storage cylinder core shaft 24 and the locking rod 421 to achieve the technical effect of rapid response to upward movement, that is, to improve the mold opening response speed.

[0041] In the present invention, the oil storage chamber 2 acts as an auxiliary oil tank, that is, it can store oil when the mold is opened, and can output oil when the mold is closed. No external auxiliary oil tank is required, which makes the overall volume smaller. At the same time, it can realize the internal circulation of the oil in the cylinder body 1, shorten the oil transportation path, and make the action response of the oil storage cylinder core shaft 24 and the clamping rod 421 faster;

[0042] In addition, a structure similar to a "syringe" is formed, in which the ends of the locking rod 421 and the oil storage cylinder core shaft 24 are respectively connected to the upper template 5. The force generated before the mold is closed is relatively small, and a larger pressure is generated after the mold is closed, which is safer during the production process.

[0043] The present invention has two oil storage chambers 2, each of which is provided with an oil storage cylinder core shaft 24 passing through the cylinder body 1, and has two oil storage cylinder core shafts 24 and a locking rod 421 for movement, and the two oil storage cylinder core shafts 24 are distributed on both sides of the locking rod 421, so that the overall force is more uniform, and at the same time, it has two oil storage parts in disguise, so that the oil volume is more abundant.

[0044] In the embodiment of the present invention, the flow channel 48 formed between the lower chamber 22 and the locking chamber 31 is in an inverted "C" shape. Such a design can make the opening of the flow channel 48 directly correspond to the lower end surface of the piston of the oil storage cylinder core shaft 24. When the mold is in the open state, the hydraulic oil can flow out from the bottom to the top and be directly applied to the lower end surface of the piston, reducing power loss and facilitating its rise.

[0045] In the embodiment of the present invention, one end of the fast cylinder core shaft 41 is fixed to the upper end of the cylinder body 1, and the other end extends into the clamping chamber 31. An oil injection channel 47 is provided in the fast cylinder core shaft 41, and the oil injection channel 47 is connected to the second oil hole 46.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A quick mold cylinder for a vertical injection molding machine, comprising a cylinder body (1), Features: At least one oil storage chamber (2) and a mold locking chamber (31) are formed in the cylinder body (1); the oil storage chamber (2) and the mold locking chamber (31) are communicated with each other, and the mold locking chamber (31) is provided with an oil hole three; The oil storage chamber (2) is provided with an oil storage cylinder core shaft (24) passing through the cylinder body (1); the end of the oil storage cylinder core shaft (24) divides the oil storage chamber (2) into two independent upper chambers (21) and lower chambers (22); the lower chamber (22) is communicated with the clamping chamber (31); and the upper chamber (21) is provided with a through hole (23) communicated with the outside; A quick cylinder core shaft (41) is fixedly arranged in the clamping chamber (31), a clamping rod (421) extending out of the cylinder body (1) is sleeved on the outer periphery of the quick cylinder core shaft (41), the interior of the clamping rod (421) and the end of the quick cylinder core shaft (41) form a quick cylinder cavity (43), the quick cylinder cavity (43) is provided with an oil hole 1 (44), the inner wall of the clamping rod (421) and the outer wall of the quick cylinder core shaft (41) form an oil filling cavity (45), and the quick cylinder core shaft (41) is provided with an oil hole 2 (46); The flow channel (48) formed between the lower chamber (22) and the clamping chamber (31) is in an inverted "C" shape; The clamping rod (421) is located at one end of the clamping chamber (31) and is provided with a supporting portion (422) extending toward the side wall of the clamping chamber (31); a groove (34) is provided at the lower part of the clamping chamber (31); the flow channel (48) is connected to the groove (34); and the oil hole three includes a hole one and a hole two corresponding to the clamping chamber (31) and the groove (34) respectively; A groove adapted to the supporting part is provided at the bottom of the clamping cavity. When the maximum stroke of the mold is reached, the supporting part is placed in the groove of the clamping cavity, and the bottom surface of the supporting part fits with the bottom surface of the groove. At this time, the side surface of the supporting part blocks the flow channel, so that the hydraulic oil in the clamping cavity cannot flow into the lower cavity. A hole one and a hole two which are interconnected are arranged on the outer side of the cylinder body. The hydraulic oil in the groove flows out from the hole two and flows back from the hole one into the clamping cavity to form a circulation.

2. A quick mold cylinder for a vertical injection molding machine according to claim 1, Features: The oil storage chambers (2) are provided with two, each of which is provided with an oil storage cylinder core shaft (24) passing through the cylinder body (1).

3. A quick mold cylinder for a vertical injection molding machine according to claim 2, Features: One end of the fast cylinder core shaft (41) is fixed to the upper end of the cylinder body (1), and the other end extends into the clamping cavity (31). An oil injection channel (47) is provided in the fast cylinder core shaft (41), and the oil injection channel (47) is connected to the second oil hole (46).

4. A quick mold cylinder for a vertical injection molding machine according to claim 1, Features: The cylinder body (1) forms a support frame (51), and the support frame (51) is provided with a plurality of holes (52) for installing guide pillars.

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