A hand-operated straight-pull clamp

Abstract

The application provides a manual straight-pull type mold clamp, which comprises a cylinder, a pressurizing plunger, a pressure-bearing ring and a shaft, a first installation groove with an upper opening is formed in the cylinder, the pressurizing plunger is arranged in the first installation groove and can move axially along the first installation groove, a blocking piece for blocking the pressurizing plunger is arranged in the first installation groove at the opening, an annular groove is formed in the cylinder, the pressure-bearing ring is movably arranged in the annular groove, an installation through hole is arranged on the cylinder, the shaft is arranged in the installation through hole, and the installation through hole is concentrically arranged with the annular groove; an oil injection hole is arranged on the cylinder, a flow channel is arranged in the cylinder and communicates with the oil injection hole, and the flow channel communicates the oil injection hole with the first installation groove. Through the arrangement of the pressurizing plunger, the oil pressure in the cylinder is pressurized, the oil pressure acts on the bottom of the pressure-bearing ring, the pressure-bearing ring is pushed to move downwards, and the mold and the table are clamped together with a force of several tons under the joint action of the shaft, a smaller tightening force can be used to generate a larger hydraulic pressure to clamp the mold, and the investment cost is lower.

Description

Technical Field

[0001] This application relates to the technical field of mold clamps, and specifically to a manual straight-pull type mold clamp. Background Technology

[0002] Quick mold change systems are primarily used for the rapid replacement of molds in punch presses, injection molding machines, die casting machines, and various automated equipment. By using automated mold clamping devices to lock the mold, quick mold change systems can significantly reduce mold change time, decrease equipment downtime, and increase production capacity. The simple operation method can reduce the number of personnel on the production line, thereby reducing labor intensity and labor costs.

[0003] The straight-pull type mold clamp uses high-pressure oil as its power source and clamps the mold in a U-shaped groove along the edge. This type of clamp has the advantage of saving space. Currently, commonly used straight-pull type mold clamps are powered by a hydraulic pump station supplying high-pressure oil, and the clamping or loosening state of the clamp is controlled by an electrical control system via solenoid valves. Due to the high cost of quick mold change systems that include hydraulic pump stations, electrical control systems, and mold clamps, some factories or equipment still use traditional mold clamping plates to clamp the mold by forcefully tightening bolts and nuts. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention provides a manual straight-pull mold clamping device that can generate greater hydraulic pressure to clamp the mold using a smaller tightening force, and at a lower cost.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a manual straight-pull mold clamp, including a cylinder body, a pressure plunger, a pressure ring, and a shaft. The cylinder body has a first mounting groove with an upper opening. The pressure plunger, which can move axially along the first mounting groove, is disposed in the first mounting groove. A blocking element for blocking the pressure plunger is disposed at the opening of the first mounting groove. The cylinder body has an annular groove, in which the pressure ring is movably disposed. The cylinder body has a mounting through hole, in which the shaft is disposed. The mounting through hole is concentric with the annular groove. The cylinder body has an oil injection hole, and a flow channel communicating with the oil injection hole is disposed inside the cylinder body, connecting the oil injection hole to the first mounting groove.

[0008] In this solution, a pressure plunger is installed to pressurize the oil in the cylinder. The oil pressure acts on the bottom of the bearing ring, pushing the bearing ring downward. Under the combined action of the shaft, the mold and the platform are clamped together with a force of several tons. A large hydraulic pressure can be generated to clamp the mold by using a small tightening force, and the investment cost is lower.

[0009] Preferably, the cylinder also includes a pressure indicator pin, and the cylinder body has a second mounting groove with an upper opening. The pressure indicator pin is movably disposed in the second mounting groove, and the flow channel connects the second mounting groove to the oil injection hole.

[0010] In this design, the pressure indicator pin can better remind the user that the pressure plunger has been tightened to a sufficient depth.

[0011] As a further preferred embodiment, a spring is sleeved around the pressure indicator pin, and a cover is provided at the opening of the second mounting groove. The two ends of the spring are respectively connected to the boss of the pressure indicator pin and the lower end face of the cover.

[0012] In this design, the high-pressure oil acts on the bottom of the pressure indicator pin, which overcomes the spring's thrust and causes the pressure indicator pin to rise gradually. When the top surface of the pressure indicator pin is flush with the top surface of the cover, the oil pressure inside the cylinder reaches the clamping pressure required by the mold.

[0013] Preferably, an ED plug is provided inside the oil injection hole to seal the oil injection hole.

[0014] In this design, the ED plug is used to seal the oil injection hole.

[0015] Preferably, the outer peripheral wall of the cylinder is provided with knurling.

[0016] In this design, the knurling is used to increase the friction when the cylinder is rotated by hand.

[0017] Preferably, the outer peripheral wall of the cylinder is provided with multiple wrench holes.

[0018] In this design, inserting a wrench into the wrench hole increases the torque when rotating the cylinder, making it easier to loosen or tighten the cylinder.

[0019] As a further preferred embodiment, grooves are provided on the pressurizing plunger, the pressure bearing ring, and the pressure indicating pin.

[0020] As a further preferred embodiment, an O-ring is provided in the groove.

[0021] In this design, O-rings are used to prevent oil leakage from the cylinder cavity of the mold clamp.

[0022] Preferably, the pressurizing plunger is provided with a manual pressurizing part, which allows the pressurizing plunger to move up and down along the first mounting groove by manually applying force to the manual pressurizing part.

[0023] Preferably, the number of the first mounting slots is two.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the beneficial effects that this specification can achieve include at least the following:

[0026] (1) Compared with the traditional method of clamping the mold by tightening the bolts and nuts with great force using the mold clamping plate, the manual straight pull mold clamp can generate greater hydraulic pressure by using a smaller tightening force to clamp the mold.

[0027] (2) Compared with the quick mold change system that includes hydraulic pump station, electrical control system and mold clamp, it does not require a high economic cost investment. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the first structure of a manual straight-pull type mold clamping device according to this utility model;

[0030] Figure 2 This is a schematic diagram of the second structure of a manual straight-pull type mold clamping device according to this utility model;

[0031] Figure 3 This is a first structural schematic diagram of the cylinder body of a manual straight-pull type mold clamping device according to this utility model;

[0032] Figure 4 This is a second structural schematic diagram of the cylinder body of a manual straight-pull mold clamp according to this utility model;

[0033] Figure 5 This is a schematic diagram of the pressure plunger, pressure ring, and pressure indicator pin of a manual straight-pull mold clamp according to this utility model;

[0034] Figure 6 This is a first cross-sectional view of a manual straight-pull type mold clamping device according to this utility model;

[0035] Figure 7 This is a second cross-sectional view of a manual straight-pull type mold clamping device according to this utility model;

[0036] Figure 8 This is a cross-sectional structural diagram of the working state of a manual straight-pull type mold clamping device according to this utility model.

[0037] The component names corresponding to the various labels in the figure are: 1. Cylinder block; 2. Pressure plunger; 3. Pressure ring; 4. Shaft; 5. First mounting groove; 6. Blocking component; 7. Annular groove; 8. Mounting through hole; 9. Oil injection hole; 10. Flow channel; 11. Pressure indicator pin; 12. Second mounting groove; 13. Spring; 14. Cover; 15. ED plug; 16. Knurled pattern; 17. Wrench hole; 18. Groove; 19. O-ring seal; 20. Punch press; 21. Die. Detailed Implementation

[0038] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0039] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0041] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0043] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0044] This application provides a manual straight-pull mold clamp, including a cylinder body 1, a pressure plunger 2, a pressure ring 3, and a shaft 4. The cylinder body 1 has a first mounting groove 5 with an upper opening. The pressure plunger 2, which can move axially along the first mounting groove 5, is disposed in the first mounting groove 5. A blocking member 6 for blocking the pressure plunger 2 is disposed at the opening of the first mounting groove 5. The cylinder body 1 has an annular groove 7, in which the pressure ring 3 is movably disposed. The cylinder body 1 has a mounting through hole 8, in which the shaft 4 is disposed. The mounting through hole 8 is concentric with the annular groove 7. The cylinder body 1 has an oil injection hole 9, and a flow channel 10 communicating with the oil injection hole 9 is disposed in the cylinder body 1. The flow channel 10 connects the oil injection hole 9 to the first mounting groove 5. The pressurizing plunger 2 is equipped with a manual pressurizing part, which allows the pressurizing plunger 2 to be manually driven to move up and down along the first mounting groove 5 by manually applying force to the manual pressurizing part. There are two first mounting grooves 5.

[0045] Furthermore, as a preferred embodiment, it also includes a pressure indicator pin 11. The cylinder body 1 has a second mounting groove 12 with an upper opening. The pressure indicator pin 11 is movably disposed in the second mounting groove 12. The flow channel 10 connects the second mounting groove 12 with the oil injection hole 9.

[0046] Furthermore, as a preferred embodiment, a spring 13 is sleeved around the pressure indicator pin 11, and a cover 14 is provided at the opening of the second mounting groove 12. The two ends of the spring 13 are respectively connected to the boss of the pressure indicator pin 11 and the lower end face of the cover 14.

[0047] Furthermore, as a preferred embodiment, an ED plug 15 is provided inside the oil injection hole 9 to seal the oil injection hole 9. The outer peripheral wall of the cylinder body 1 is provided with knurled patterns 16.

[0048] Furthermore, as a preferred embodiment, the outer peripheral wall of the cylinder 1 is provided with a plurality of wrench holes 17.

[0049] Furthermore, as a preferred embodiment, grooves 18 are provided on the pressurizing plunger 2, the pressure bearing ring 3, and the pressure indicating pin 11. An O-ring seal 19 is provided in the groove 18.

[0050] Specifically, in this embodiment, the cylinder body 1 is provided with two first mounting grooves 5. The pressure plunger 2 is installed in the first mounting groove 5 and connected to the first mounting groove 5 of the cylinder body 1 by threads. The pressure plunger 2 is provided with a manual pressure part, which is opened in a hexagonal threaded hole on the pressure plunger 2. A wrench or other object can be connected in the hexagonal threaded hole, and the pressure plunger 2 can be manually rotated to move up and down in the first mounting groove 5. The opening of the first mounting groove 5 is provided with a mounting hole, and a blocking member 6 is provided in the mounting hole. The blocking member 6 is an elastic retaining ring, which is used to restrict the position of the pressure plunger 2 from being screwed out. The cylinder body 1 is provided with an annular groove 7, in which the pressure ring 3 can move axially. The cylinder body 1 is provided with a mounting through hole 8 concentric with the annular groove 7 and a threaded hole. The cylinder body 1 is threaded through the mounting hole 8 and the shaft 4 passes through the mounting through hole 8. A second mounting groove 12 is provided on the cylinder body 1, and a pressure indicator pin 11 is inserted into the second mounting groove 12. A spring 13 and a cover 14 are used to press the pressure indicator pin 11. An oil filling hole 9 is provided on the cylinder body 1. After the cylinder body 1 cavity is filled with oil, an ED plug 15 is used to seal the oil filling hole 9. Four flow channels 10 are provided at the bottom of the annular groove 7 on the cylinder body 1, respectively communicating with the bottom of the two first mounting grooves 5, the second mounting groove 12, and the oil filling hole 9. Knurled patterns 16 are provided on the cylinder body 1 to increase the friction when rotating the cylinder body 1 by hand. Four wrench holes 17 are provided on the outer circumferential surface of the cylinder body 1. Inserting a wrench increases the torque when rotating the cylinder body 1, making it easier to loosen or tighten the cylinder body 1. Grooves 18 for placing O-ring seals 19 are provided on the pressure plunger 2, the pressure ring 3, and the pressure indicator pin 11. The O-ring 19 consists of a sealing ring and a nylon retaining ring to prevent oil leakage from the cavity of the mold clamping cylinder 1.

[0051] Specifically, in this embodiment, as Figures 1-4 As shown, before using the clamping device, an Allen wrench is used to screw the two pressure plungers 2 to the position where they fit against the elastic retaining ring of the hole, and to fit the pressure ring 3 against the bottom of the annular groove 7 of the cylinder body 1. Hydraulic oil is added to the cavity of the cylinder body 1 through the oil injection hole 9. The oil flows through the four flow channels 10 at the bottom of the annular groove 7, into the bottom of the two first mounting grooves 5 and the second mounting groove 12, and the bottom of the pressure ring 3, respectively. After filling with oil, the oil injection hole 9 is sealed with the ED plug 15. At this time, under the push of the spring 13, the top surface of the pressure indicator pin 11 is lower than the top surface of the cover 14.

[0052] Specifically, in this embodiment, when using a clamping device to hold the mold 21, the clamping device is placed in the T-slot of the equipment platform and the U-slot on the edge of the mold 21. The cylinder body 1 is held by hand at the knurled 16 or a wrench is inserted into the wrench hole 17 on the outer surface of the cylinder body 1. The cylinder body 1 is rotated to make the pressure ring 3 fit tightly against the edge of the mold 21. One of the pressure plungers 2 is rotated using an Allen wrench, or both pressure plungers 2 are rotated sequentially. As the pressure plunger 2 moves downward, the oil pressure inside the cylinder body 1 is compressed, and the pressure gradually increases. The high-pressure oil acts on the bottom of the pressure indicator pin 11, overcoming the thrust of the spring 13, causing the pressure indicator pin 11 to gradually rise. When the top surface of the pressure indicator pin 11 is flush with the top surface of the cover 14, the oil pressure in the cylinder 1 cavity reaches the clamping pressure required by the mold. This oil pressure acts on the bottom of the bearing ring 3, pushing the bearing ring 3 downward. The shaft 4 includes a vertical rod part, a connecting part, and a snap-fit ​​part. The connecting part is inserted into the punch press 20, and the snap-fit ​​part is snapped into the T-slot on the punch press, fixing the shaft 4 as a whole. The vertical rod part passes through the punch press 20 and the mold 21 and connects to the cylinder 1. Under the combined action of the bearing ring 3 and the table of the punch press 20, the mold 21 and the table are clamped together with a force of several tons.

[0053] Specifically, in this embodiment, when it is necessary to loosen the mold 21, use an Allen wrench to rotate the pressure plunger 2 in the opposite direction until both pressure plungers 2 are in contact with the elastic retaining ring. Hold the knurled part 16 on the cylinder body 1 or insert a wrench into the wrench hole 17 on the outer surface of the cylinder body 1, rotate the cylinder body 1, causing the pressure ring 3 to disengage from the edge of the mold 21, and the mold clamping device achieves the mold loosening action. Compared with the traditional method of clamping the mold 21 by forcefully tightening the bolts and nuts using a mold pressure plate, the manual straight-pull mold clamping device can generate greater hydraulic pressure to clamp the mold 21 using a smaller tightening force. Compared with a quick mold change system that includes a hydraulic pump station, electrical control system and mold clamping device, it does not require a high economic cost investment.

[0054] Specifically, in this embodiment, by setting a pressure plunger 2, the oil pressure in the cylinder 1 is increased. The oil pressure acts on the bottom of the pressure ring 3, pushing the pressure ring 3 downward. Under the combined action of the shaft 4, the mold 21 and the platform are clamped together with a force of several tons. A large hydraulic pressure can be generated by using a small tightening force to clamp the mold 21, and the investment cost is lower.

[0055] Specifically, in this embodiment, the pressure indicator pin 11 can better remind the user that the pressure plunger 2 has been tightened to a sufficient depth. The high-pressure oil acts on the bottom of the pressure indicator pin 11, which will overcome the thrust of the spring 13 and cause the pressure indicator pin 11 to rise gradually. When the top surface of the pressure indicator pin 11 is flush with the top surface of the cover 14, the oil pressure in the cavity of the cylinder 1 reaches the clamping pressure required by the mold.

[0056] Specifically, in this embodiment, the ED plug 15 is used to seal the oil injection hole 9. The knurling 16 is used to increase the friction when the cylinder 1 is rotated by hand. Inserting a wrench into the wrench hole 17 can increase the torque when rotating the cylinder 1, making it easier to loosen or tighten the cylinder 1. The O-ring seal 19 is used to prevent oil leakage from the cavity of the clamping cylinder 1.

[0057] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A manually operated straight-pull type mold clamp, characterized in that, The device includes a cylinder body (1), a pressurizing plunger (2), a pressure-bearing ring (3), and a shaft (4). The cylinder body (1) has a first mounting groove (5) with an upper opening. The pressurizing plunger (2) is installed in the first mounting groove (5) and can move axially along the first mounting groove (5). A blocking member (6) for blocking the pressurizing plunger (2) is installed at the opening of the first mounting groove (5). The cylinder body (1) has an annular groove (7) and the pressure-bearing ring (3) is movably installed in the annular groove (7). The cylinder body (1) has a mounting through hole (8) and the shaft (4) is installed in the mounting through hole (8). The mounting through hole (8) and the annular groove (7) are concentrically arranged. The cylinder body (1) has an oil injection hole (9) and a flow channel (10) communicating with the oil injection hole (9) is provided in the cylinder body (1). The flow channel (10) connects the oil injection hole (9) with the first mounting groove (5).

2. The manual straight-pull type mold clamping device according to claim 1, characterized in that, It also includes a pressure indicator pin (11), and a second mounting groove (12) with an upper opening is provided on the cylinder body (1). The pressure indicator pin (11) is movably disposed in the second mounting groove (12), and the flow channel (10) connects the second mounting groove (12) with the oil injection hole (9).

3. The manual straight-pull type mold clamping device according to claim 2, characterized in that, A spring (13) is sleeved on the outer periphery of the pressure indicator pin (11), and a cover (14) is provided at the opening of the second mounting groove (12). The two ends of the spring (13) are respectively connected to the boss of the pressure indicator pin (11) and the lower end face of the cover (14).

4. The manual straight-pull type mold clamping device according to claim 1, characterized in that, An ED plug (15) is provided inside the oil injection hole (9) to seal the oil injection hole (9).

5. The manual straight-pull type mold clamping device according to claim 1, characterized in that, The outer peripheral wall of the cylinder (1) is provided with knurling (16).

6. The manual straight-pull type mold clamping device according to claim 1, characterized in that, The cylinder (1) has multiple wrench holes (17) on its outer peripheral wall.

7. The manual straight-pull type mold clamping device according to claim 2, characterized in that, Grooves (18) are provided on the pressurizing plunger (2), the pressure bearing ring (3), and the pressure indicating pin (11).

8. The manual straight-pull type mold clamping device according to claim 7, characterized in that, An O-ring (19) is provided in the groove (18).

9. The manual straight-pull type mold clamping device according to claim 1, characterized in that, The pressurizing plunger (2) is provided with a manual pressurizing part. By manually applying force to the manual pressurizing part, the pressurizing plunger (2) can be manually driven to move up and down along the first mounting groove (5).

10. The manual straight-pull type mold clamping device according to claim 1, characterized in that, The number of the first mounting slots (5) is two.

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