Structure for preventing sliding block of hydraulic oil cylinder from retreating for die

Abstract

The utility model discloses a structure for preventing a sliding block of a hydraulic oil cylinder from retreating for a die, which is characterized in that a first inclined wedge surface is formed at the bottom of the front end part of the sliding block of the oil cylinder, symmetrical limiting baffles are formed on the two sides of the first inclined wedge surface, chamfering parts are formed at the corners of the limiting baffles, and linkage buckling strips which protrude inwards are formed on the inner sides of the chamfering parts; a blocking part is formed on the bottom surface of the oil cylinder sliding block; the core-pulling sliding block is arranged in an up-down sliding mode, a second inclined wedge surface is formed on the top of the core-pulling sliding block, and the second inclined wedge surface is matched with the first inclined wedge surface in a sliding and abutting mode; protruding linkage eaves are arranged on the two sides of the second inclined wedge face, and the linkage eaves are matched with the linkage buckling strips in a sliding and buckling mode. And a limiting shoulder is arranged below the linkage eave edge and comprises a mold closing inclined wedge surface, an anti-retreating horizontal surface and a mold closing limiting inclined surface which are sequentially connected from bottom to top. During mold closing, self-locking is formed through abutting fit of the anti-retreating horizontal plane and the blocking part, and the hydraulic oil cylinder is prevented from directly resisting injection molding stress.

Description

Technical Field

[0001] The utility model relates to the technical field of mold equipment, in particular to a hydraulic oil cylinder slide block retreat prevention structure for a mold. Background Art

[0002] In existing mold equipment, hydraulic cylinders are often used as the core pulling power source, such as the attached Figure 5 As shown, the hydraulic cylinder drives the cylinder slider to make linear reciprocating motion, and the sliding connection between the linkage inclined groove 39 of the cylinder slider 3 and the linkage eave 441 of the core pulling slider 4 drives the core pulling slider 4 that slides up and down to move upward and downward, thereby realizing the functional conversion of the mold closing state and the core pulling state of the core pulling mechanism. However, this core pulling device has the following disadvantages: 1. The core pulling slider 4 relies solely on the thrust of the hydraulic cylinder to lock the mold. When the injection pressure is greater than the cylinder thrust, the core pulling slider 4 is prone to displacement, resulting in product quality defects such as injection molding overflow and flashing; 2. When the injection pressure is too high, it is necessary to replace the hydraulic cylinder with a larger rated thrust as the core pulling power source. The hydraulic cylinder with a large thrust is prone to damage the mold assembly and affect the life of the mold equipment; 3. There is a lack of self-locking structure in the core pulling device. During the injection molding production process, the mold core structure is easily affected by the gradually increasing injection pressure, and becomes loose, affecting the molding quality. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a structure for preventing a hydraulic cylinder slider from retreating for a mold, and to set an injection stress countermeasure structure between the core-pulling slider and the cylinder slider to eliminate the stress countermeasure of the cylinder, prevent the cylinder from retreating, improve the working stability of the mold equipment, and improve the yield rate of the product.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a structure for preventing a hydraulic cylinder slider from retreating for a mold, comprising a hydraulic cylinder, a cylinder slider, a guide pressure block and a core pulling slider, two guide pressure blocks are set, the two guide pressure blocks are respectively arranged on both sides of the cylinder slider, and cooperate with the sliding limit of the cylinder slider, the output shaft of the hydraulic cylinder is connected to the cylinder slider, a first inclined wedge surface is formed at the bottom of the front end of the cylinder slider, symmetrical limit baffles are formed on both sides of the first inclined wedge surface, chamfered portions are formed at the corners of the limit baffles, and an inwardly protruding linkage buckle strip is formed on the inner side of the chamfered portion The bottom surface of the oil cylinder slider forms a blocking part; the core-pulling slider is set to slide up and down, and a second inclined wedge surface is formed on the top of the core-pulling slider, and the second inclined wedge surface slides and abuts against the first inclined wedge surface; protruding linkage eaves are provided on both sides of the second inclined wedge surface, and the linkage eaves slide and buckle with the linkage buckle strip; a limiting shoulder is provided below the linkage eaves, and the limiting shoulder includes a mold closing inclined wedge surface, an anti-backward horizontal surface and a mold closing limiting inclined surface which are sequentially connected from bottom to top. When closing the mold, the mold closing inclined wedge surface slides and abuts against the chamfered part, the anti-backward horizontal surface abuts against the blocking part, and the mold closing limiting inclined surface abuts against the chamfered part for limiting position.

[0005] In a further technical solution, a limiting shoulder groove is formed on the inner side of the guide pressure block; limiting convex edges are formed on both sides of the cylinder slider, and the limiting convex edges match the limiting shoulder groove, and these two limiting convex edges respectively cooperate with the limiting shoulder grooves of the corresponding guide pressure block for sliding limitation.

[0006] In a further technical solution, a connecting slot is provided at the rear end of the cylinder slider, a connecting piece is embedded in the connecting slot, an interface and a locking bolt are provided at the end of the connecting piece, the piston rod of the hydraulic cylinder is inserted into the interface, and the locking bolt tightens the piston rod of the hydraulic cylinder.

[0007] In a further technical solution, a pure copper sheet is mounted on the side of the core-pulling slider for self-lubrication.

[0008] In a further technical solution, the mold clamping bevel wedge surface and the linkage eaves are arranged parallel to each other, and a linkage limit groove is formed between the mold clamping bevel wedge surface and the bottom surface of the linkage eaves. The linkage limit groove matches the linkage buckle strip, and the two are slidably connected and cooperated.

[0009] In a further technical solution, two limit baffles and the first inclined wedge surface surround an assembly channel, and the inner side of the assembly channel is provided with a wear-resistant lubricating layer, which includes a bonding layer, a main wear-resistant layer and a lubricating layer arranged in sequence from the inside to the outside.

[0010] In a further technical solution, the spacing between the inner side surfaces of the two limit baffles matches the width of the second inclined wedge surface; the side portions of the linkage eaves are arranged in a vertical plane, and the linkage eaves are respectively slidably matched with the inner side surfaces of the corresponding limit baffles.

[0011] In a further technical solution, a displacement sensor is provided on the top of the hydraulic cylinder, and the displacement sensor is triggered to cooperate with the cylinder slider.

[0012] After adopting the above structure, the advantages of the utility model compared with the prior art are as follows: the utility model provides a structure for preventing a hydraulic cylinder slider from retreating for a mold, and by improving the linkage structure between the cylinder slider and the core pulling slider, the anti-retreat horizontal surface of the core pulling slider is matched with the blocking part when the mold is closed to form a self-locking structure, thereby eliminating the stress confrontation during the injection molding process of the hydraulic cylinder, preventing the cylinder from retreating, improving the working stability of the mold equipment, and improving the yield rate of the product; a wear-resistant lubrication structure is provided in the assembly channel of the cylinder slider, which can increase the effective number of cooperation times between the cylinder slider and the core pulling slider and extend the service life of the core pulling device; a pure copper sheet with a self-lubricating effect is provided on the side of the core pulling slider, which improves the movement smoothness of the core pulling slider, extends its maintenance cycle, and makes the operation of the core pulling device more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the oil cylinder slider in the utility model.

[0016] Figure 3 It is a structural schematic diagram of the core-pulling slider in the utility model.

[0017] Figure 4 It is a schematic diagram of the action of the utility model in the mold closing state.

[0018] Figure 5 It is a structural diagram of an oil cylinder core pulling device in the prior art. DETAILED DESCRIPTION

[0019] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0020] like Figures 1 to 4A hydraulic cylinder 1 slider retreat structure for a mold, comprising a hydraulic cylinder 1, a cylinder slider 3, a guide pressure block 2 and a core-pulling slider 4. The number of guide pressure blocks 2 is two. The two guide pressure blocks 2 are respectively arranged on both sides of the cylinder slider 3 and cooperate with the cylinder slider 3 to slide and limit. The output shaft of the hydraulic cylinder 1 is connected to the cylinder slider 3. The bottom of the front end of the cylinder slider 3 is formed with a first inclined wedge surface 33, and symmetrical limit baffles are formed on both sides of the first inclined wedge surface 33. The corners of the limit baffle are formed with chamfered parts, and the inner side of the chamfered part is formed with an inwardly protruding linkage buckle strip 32. The bottom surface of the cylinder slider 3 forms a blocking part 34; the core-pulling slider 4 is up and down Sliding arrangement, a second inclined wedge surface 41 is formed on the top of the core-pulling slider 4, and the second inclined wedge surface 41 and the first inclined wedge surface 33 are slidably abutted and matched; protruding linkage eaves 411 are provided on both sides of the second inclined wedge surface 41, and the linkage eaves 411 are slidably buckled and matched with the linkage buckle strip 32; a limiting shoulder is provided below the linkage eaves 411, and the limiting shoulder includes a mold closing inclined wedge surface 412, an anti-backward horizontal surface 413 and a mold closing limiting inclined surface 414 which are sequentially connected from bottom to top. When the mold is closed, the mold closing inclined wedge surface 412 and the chamfered part are slidably abutted and matched, the anti-backward horizontal surface 413 and the blocking part 34 are abutted and matched, and the mold closing limiting inclined surface 414 and the chamfered part are abutted and limited.

[0021] During the mold closing process, the piston rod of the hydraulic cylinder 1 extends forward, driving the cylinder slider 3 to move forward toward the core pulling slider 4, and the mold closing inclined wedge surface 412 slides and abuts against the chamfered part, thereby pushing the core pulling slider 4 downward for mold closing; the cylinder slider 3 continues to move forward until the mold closing limit inclined surface 414 abuts against the chamfered part, and at the same time, the anti-retraction horizontal surface 413 abuts against the blocking part 34 to form a self-locking structure, avoiding the injection stress of the core pulling slider 4 directly acting on the hydraulic cylinder 1, preventing the cylinder from retreating, improving the working stability of the mold equipment, and improving the product yield.

[0022] During the mold opening process, the piston rod of the hydraulic cylinder 1 retracts and retreats, driving the cylinder slider 3 to retreat, and the linkage buckle strip 32 and the linkage eave edge 411 are slidably engaged and engaged, driving the core-pulling slider 4 to move upward for core-pulling.

[0023] The core pulling device is cleverly designed, and improves the simple inclined wedge structure between the cylinder slider 3 and the core pulling slider 4, so that the two can achieve limit fit and blocking self-locking fit during the linkage process. The equipment modification cost is low, it is easy to promote, and it can effectively improve the working stability of the mold equipment and improve the product yield.

[0024] A sliding assembly structure is provided between the cylinder slider 3 and the template, specifically, a limiting shoulder groove is formed on the inner side of the guide pressure block 2; limiting convex edges are formed on both sides of the cylinder slider 3, and the limiting convex edges match the limiting shoulder grooves. These two limiting convex edges are respectively matched with the corresponding limiting shoulder grooves of the guide pressure block 2 for sliding limitation.

[0025] A quick-release connection structure is provided between the oil cylinder slide block 3 and the piston rod of the hydraulic oil cylinder 1. Specifically, a connection slot 30 is provided at the rear end of the oil cylinder slide block 3. A connecting piece 11 is embedded in the connecting slot 30. An interface and a locking bolt are provided at the end of the connecting piece 11. The piston rod of the hydraulic oil cylinder 1 is inserted into the interface. The locking bolt is tightened to act on the piston rod of the hydraulic oil cylinder 1. The quick disassembly and assembly between the two can be achieved by loosening and tightening the locking bolt.

[0026] Specifically, the side of the core-pulling slider 4 is equipped with a pure copper sheet 40 for self-lubrication. The side of the core-pulling slider 4 is provided with a pure copper sheet 40 with a self-lubricating effect, which improves the movement smoothness of the core-pulling slider 4, extends its maintenance cycle, and makes the operation of the core-pulling device more stable and reliable.

[0027] Specifically, the mold clamping inclined wedge surface 412 and the linkage eave edge 411 are arranged parallel to each other, and a linkage limiting groove 410 is formed between the mold clamping inclined wedge surface 412 and the bottom surface of the linkage eave edge 411. The linkage limiting groove 410 matches the linkage buckle strip 32, and the two are slidably connected and cooperated.

[0028] Specifically, the two limit baffles and the first inclined wedge surface 33 surround and form an assembly channel 31. The inner side of the assembly channel 31 is provided with a wear-resistant lubricating layer, and the wear-resistant lubricating layer includes a bonding layer, a main wear-resistant layer and a lubricating layer arranged in sequence from the inside to the outside. The assembly channel 31 of the cylinder slider 3 is provided with a wear-resistant lubricating structure, which can increase the number of effective matching times between the cylinder slider 3 and the core pulling slider 4 and extend the service life of the core pulling device.

[0029] Specifically, the spacing between the inner side surfaces of the two limit baffles matches the width of the second inclined wedge surface 41; the side of the linkage eaves 411 is arranged in a vertical plane, and the linkage eaves 411 are respectively slidably matched with the inner side surfaces of the corresponding limit baffles.

[0030] Specifically, a displacement sensor is provided on the top of the hydraulic cylinder 1 , and the displacement sensor is triggered and coordinated with the cylinder slider 3 .

[0031] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A structure for preventing a hydraulic cylinder slider from retreating for a mold, comprising a hydraulic cylinder (1), a cylinder slider (3), a guide pressure block (2) and a core-pulling slider (4), wherein two guide pressure blocks (2) are provided, and the two guide pressure blocks (2) are respectively provided on both sides of the cylinder slider (3) and are slidably limited with the cylinder slider (3); the output shaft of the hydraulic cylinder (1) is connected to the cylinder slider (3); Features: A first inclined wedge surface (33) is formed at the bottom of the front end of the oil cylinder slider (3), symmetrical limit baffles are formed on both sides of the first inclined wedge surface (33), chamfered portions are formed at the corners of the limit baffles, and an inwardly protruding linkage buckle strip (32) is formed inside the chamfered portions, and a blocking portion (34) is formed on the bottom surface of the oil cylinder slider (3); The core-pulling slider (4) is arranged to slide up and down, and a second inclined wedge surface (41) is formed on the top of the core-pulling slider (4), and the second inclined wedge surface (41) and the first inclined wedge surface (33) are slidably abutted and matched; protruding linkage eaves (411) are arranged on both sides of the second inclined wedge surface (41), and the linkage eaves (411) and the linkage buckle strip (32) are slidably buckled and matched; a limiting shoulder is arranged below the linkage eaves (411), and the limiting shoulder includes a mold closing inclined wedge surface (412), an anti-backward horizontal surface (413) and a mold closing limiting inclined surface (414) which are sequentially connected from bottom to top. When closing the mold, the mold closing inclined wedge surface (412) and the chamfered portion are slidably abutted and matched, the anti-backward horizontal surface (413) and the blocking portion (34) are abutted and matched, and the mold closing limiting inclined surface (414) and the chamfered portion are abutted and limited.

2. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 1, Features: The inner side of the guide pressing block (2) is formed with a limit shoulder groove; the two sides of the oil cylinder slider (3) are respectively formed with limit convex edges, the limit convex edges match the limit shoulder groove, and the two limit convex edges are respectively slidably limited in cooperation with the limit shoulder grooves of the corresponding guide pressing block (2).

3. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 2, Features: A connecting slot (30) is provided at the rear end of the oil cylinder slide block (3), a connecting piece (11) is embedded in the connecting slot (30), an interface and a locking bolt are provided at the end of the connecting piece (11), the piston rod of the hydraulic oil cylinder (1) is inserted into the interface, and the locking bolt is tightened to act on the piston rod of the hydraulic oil cylinder (1).

4. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 3, Features: The side surface of the core-pulling slider (4) is equipped with a pure copper sheet (40) for self-lubrication.

5. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 1, Features: The mold clamping inclined wedge surface (412) and the linkage eave edge (411) are arranged parallel to each other, and a linkage limiting groove (410) is formed between the mold clamping inclined wedge surface (412) and the bottom surface of the linkage eave edge (411), and the linkage limiting groove (410) matches the linkage buckle strip (32), and the two are slidably connected and matched.

6. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 5, Features: The two limit baffles and the first inclined wedge surface (33) surround and form an assembly channel (31), and the inner side surface of the assembly channel (31) is provided with a wear-resistant lubricating layer, and the wear-resistant lubricating layer comprises a bonding layer, a main wear-resistant layer and a lubricating layer which are arranged in sequence from the inside to the outside.

7. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 6, Features: The spacing between the inner side surfaces of the two limit baffles matches the width of the second inclined wedge surface (41); the side of the linkage eaves (411) is arranged in a vertical plane, and the linkage eaves (411) are respectively slidably matched with the inner side surfaces of the corresponding limit baffles.

8. The anti-retraction structure of the hydraulic cylinder slider for a mold according to claim 7, Features: A displacement sensor is provided on the top of the hydraulic cylinder (1), and the displacement sensor is triggered to cooperate with the cylinder slide block (3).

Images