Die for producing chain saw air cylinder

Abstract

The utility model relates to the technical field of dies, and discloses a die for producing a chain saw cylinder, which comprises an upper die, a lower die and two first inclined die cores, the two first inclined die cores are symmetrically arranged, and the two first inclined die cores synchronously move in a V shape along the axial direction of air inlets of the first inclined die cores and are synchronously controlled by a linkage driving structure; the linkage driving structure comprises a control block moving along the symmetry axis of the two first inclined mold cores and guide sliding grooves formed in the two sides of the control block and allowing the first inclined mold cores to be embedded and slide, the two guide sliding grooves are arranged in a V shape, the opening direction of the two guide sliding grooves is opposite to the opening direction of the V shape formed by the two first inclined mold cores, and the first inclined mold cores have two extreme movement positions. According to the mold, the two first inclined mold cores are located on the two sides of the control block correspondingly, movement of the control block along the symmetry axis of the two first inclined mold cores is changed into synchronous movement of the two first inclined mold cores in the axial direction of the air inlet through the guide sliding grooves, and interference generated by the two first inclined mold cores can be avoided while the size of the mold is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for producing a chain saw cylinder. Background Art

[0002] The Chinese patent publication 5800 with application number 201120447948.3 discloses a chain saw casting cylinder, which includes a cylinder body and a piston. The cylinder body has a hollow chamber 5 recessed inward from one end. The side wall of the cylinder body is provided with an air inlet 2, an air outlet 3 and a piston port 4 for connecting the hollow chamber 5 with the outside of the cylinder body. The air inlet 2, the air outlet 3 and the piston port 4 are all arranged obliquely on the side wall of the cylinder body. The air inlet 2 and the piston port 4 are located on the same side of the cylinder body and have the same inclination direction, and the air outlet 3 is located on the other side of the cylinder body and has an inclination direction opposite to that of the air inlet 2.

[0003] The chainsaw cylinder 1 is usually produced by a metal casting method, that is, a molding cavity 11 is formed by a mold, and then molten metal is injected to cool and mold, and then demolded. A common casting mold includes an upper mold 6 and a lower mold 7 that form the outer contour of the chainsaw cylinder 1, a positive mold core 8 that forms the hollow cavity 5 inside the chainsaw cylinder 1, a first oblique mold core 9 that forms the air inlet 2 and the piston port 4, and a second oblique mold core 10 that forms the air outlet 3. A molding cavity 11 that can mold the chainsaw cylinder 1 is formed between the upper mold 6, the lower mold 7, the positive mold core 8, the first oblique mold core 9, and the second oblique mold core 10. When demolding, the first oblique mold core 9 moves obliquely along the axial direction of the air inlet 2, the second oblique mold core 10 moves obliquely along the axial direction of the air outlet 3, and the positive mold core 8 moves along the axial direction of the cylinder. The movement of the positive mold core 8, the first oblique mold core 9, and the second oblique mold core 10 is controlled by the oil cylinder fixed outside the mold.

[0004] Conventional molds can only process one product at a time, and the production efficiency needs to be improved. Therefore, a mold that can form two chainsaw cylinders 1 at a time has appeared. However, the mold includes a positive mold core 8 that moves along the axial direction of the chainsaw cylinder 1 and an oil cylinder that controls the movement of the positive mold core 8. In order to ensure the installation position of the oil cylinder and ensure that the positive mold core 8 can move smoothly, the two molding chambers 11 are mirror-imaged and the positive mold core 8 is located on the opposite side of the two molding chambers 11, that is, the two positive mold cores 8 are close to each other for mold closing and away from each other for demolding.

[0005] However, the two mirror-symmetrical molding cavities 11 mentioned above will cause the two first inclined mold cores 9 to be arranged in a "V" shape. The two first inclined mold cores 9 will interfere with each other during the process of tilting and demolding. In order to avoid interference and ensure the installation space of the cylinder that drives the first inclined mold core 9 to tilt, it is necessary to increase the distance between the two molding cavities 11, resulting in an increase in the volume of the entire mold, an increase in occupied space and an increase in production costs. Utility Model Content

[0006] The utility model aims at the shortcomings of the prior art that the mold occupies a large space and has a high production cost, and provides a mold for producing a chain saw cylinder, which reduces the mold volume and can avoid interference between two first oblique mold cores.

[0007] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0008] A mold for producing an oil saw cylinder comprises an upper mold, a lower mold and a first oblique mold core, wherein two first oblique mold cores are axially symmetrically arranged, and the two first oblique mold cores are synchronously approached or moved away in a "V" shape along the axial direction of the air inlet of the corresponding oil saw cylinder and are synchronously controlled by a linkage drive structure, wherein the linkage drive structure comprises a control block which reciprocates along the axis of symmetry of the two first oblique mold cores, and guide grooves which are opened on both sides of the control block and can be embedded and slid by the first oblique mold cores, wherein the two guide grooves are arranged in a "V" shape and the opening direction is opposite to the opening direction of the "V" shape formed by the two first oblique mold cores, and the first oblique mold core has two extreme motion positions, and when the first oblique mold core is located at the two extreme motion positions, the first oblique mold core moves to the air inlet molding position or completely leaves the air inlet molding position.

[0009] Compared with the prior art, the above scheme needs to increase the distance between the two molding chambers to avoid interference between the two first oblique mold cores and ensure the installation space of the oil cylinder. This scheme sets a control block that moves along the symmetry axis of the two first oblique mold cores. The two first oblique mold cores are respectively located on both sides of the control block and are inserted and slidably matched with the guide slide groove. Since the two guide slide grooves are "V" shaped, the movement of the control block along the symmetry axis of the two first oblique mold cores is changed to the synchronous movement of the two first oblique mold cores along the axial direction of the air inlet through the guide slide groove, so that the movement space of each first oblique mold core is only on one side of the control block, and no interference will occur. Only the control block is installed between the two first oblique mold cores, which greatly reduces the distance between the two first oblique mold cores, that is, greatly reduces the volume of the mold, and reduces the manufacturing cost of the mold. In addition, the movement of the two first oblique mold cores can be synchronously controlled by only driving the control block to move, which can reduce the number of oil cylinders and further reduce costs.

[0010] Preferably, a driving block is fixed on the side of the control block away from the air inlet molding position, and a limiting slide groove is recessed on the upper mold for the driving block to be inserted into and reciprocate along the moving direction of the control block. When the driving block moves to abut against the side of the limiting slide groove close to the air inlet molding position or abuts against the side of the limiting slide groove away from the air inlet molding position, the first inclined mold core is in the two extreme motion positions.

[0011] By adopting the above scheme, the driving block reciprocates along the symmetry axes of the two first inclined mold cores in the limiting slide groove, and the driving block moves to abut against the side of the limiting slide groove close to the air inlet molding position. At this time, the first inclined mold core moves to the air inlet molding position and remains stationary at this position waiting for casting. This is the first extreme motion position; the driving block moves to abut against the side of the limiting slide groove away from the air inlet molding position. At this time, the first inclined mold core moves to completely separate from the air inlet molding position and remains stationary at this position. This is the second extreme motion position.

[0012] Preferably, the movement of the driving block is controlled by a cylinder, a cylinder body of the cylinder is fixed to the outside of the lower mold, and a piston rod of the cylinder is fixedly connected to the driving block.

[0013] By adopting the above scheme, the oil cylinder is fixedly arranged outside the lower mold, and the volume of the mold is not increased. The piston rod of the oil cylinder extends to drive the control block to move close to the air inlet molding position; the piston rod of the oil cylinder retracts to drive the control block to move away from the air inlet molding position.

[0014] Preferably, a guide structure for controlling the moving direction of the drive block is provided between the drive block and the lower die, and the guide structure includes guide rails provided on both sides of the drive block on the lower die and guide blocks provided on both sides of the control block and embedded and slidably matched with the guide rails.

[0015] By adopting the above scheme, the guide rail is arranged parallel to the symmetry axis of the two first oblique mold cores, and the guide block is embedded and slidably matched with the guide rail to ensure that the driving block moves linearly along the symmetry axis of the two first oblique mold cores.

[0016] Preferably, a receiving groove is concavely provided on one side of the driving block close to the control block, the control block is partially installed in the receiving groove, and an escape space for the first inclined mold core to move is provided on the receiving groove.

[0017] With the above solution, the control block is partially installed in the driving block, which reduces the volume of the control block and the driving block in the mold and the space required for the movement of the two, and further reduces the volume of the mold. The avoidance space ensures that the first oblique mold core can move smoothly when the driving block and the control block move.

[0018] Preferably, a guide groove is provided on the lower mold for the first oblique mold core to move linearly along the axial direction of the air inlet, and the first oblique mold core is slidingly matched with the guide groove.

[0019] By adopting the above solution, the first oblique mold core is guided and slidable in the guide groove, ensuring that the first oblique mold core moves linearly along the axial direction of the air inlet.

[0020] The utility model has a significant technical effect due to the adoption of the above technical solution: through the guide slide, the movement of the control block along the symmetry axis of the two first inclined mold cores is changed to the synchronous movement of the two first inclined mold cores along the axial direction of the air inlet, and the movement space of each first inclined mold core is only on one side of the control block, and no interference will occur. Only the control block is installed between the two first inclined mold cores, which greatly reduces the distance between the two first inclined mold cores, that is, greatly reduces the volume of the mold and reduces the manufacturing cost of the mold. In addition, the synchronous movement of the two first inclined mold cores can be controlled by only driving the control block to move, which can reduce the number of cylinders and further reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a chain saw cylinder in the prior art;

[0022] Figure 2 yes Figure 1 Sectional view at AA in the figure;

[0023] Figure 3 This is an axonometric view of a mold for producing a chain saw cylinder after mold closing in an embodiment;

[0024] Figure 4 This is a disassembled diagram of a mold for producing a chain saw cylinder after mold closing in an embodiment;

[0025] Figure 5 yes Figure 4 The enlarged view of point B in the figure;

[0026] Figure 6 This is a disassembled view of a first oblique mold core in a mold for producing a cylinder for a chainsaw in an embodiment after demoulding;

[0027] Figure 7 yes Figure 6 The enlarged view of point C in the figure;

[0028] Figure 8 This is a disassembled diagram of a driving block, a control block and a first oblique mold core in a mold for producing a cylinder for a chainsaw in an embodiment;

[0029] Fig. 9 This is a disassembled diagram of a mold for producing a chain saw cylinder after mold closing in an embodiment;

[0030] Fig.10 yes Fig. 9 Sectional view at DD in the figure;

[0031] Fig.11 yes Fig.10 The enlarged view of point E in the figure;

[0032] Fig.12 It is a partial enlarged view of a first oblique mold core in a mold for producing a cylinder for a chainsaw in an embodiment after demoulding;

[0033] Fig.13 is a disassembled diagram of a mold for producing a chain saw cylinder in an embodiment;

[0034] Fig.14 yes Fig.13 The enlarged view of F in the figure;

[0035] Fig.15 is a disassembled diagram of a mold for producing a chain saw cylinder in an embodiment;

[0036] Fig.16 This is a right side view of a mold for producing a chain saw cylinder after mold closing in an embodiment;

[0037] Fig.17 yes Fig.16 The cross-sectional view at GG in FIG.

[0038] Fig.18 It is a half-section schematic diagram of a first oblique mold core in a mold for producing a chainsaw cylinder in an embodiment after demolding.

[0039] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Chainsaw cylinder; 2. Air inlet; 3. Air outlet; 4. Piston port; 5. Hollow chamber; 6. Upper mold; 7. Lower mold; 8. Positive mold core; 9. First oblique mold core; 10. Second oblique mold core; 11. Molding chamber; 12. Control block; 13. Guide slide; 14. Drive block; 15. Limit slide; 16. Cylinder; 17. Guide rail; 18. Guide block; 19. Accommodating groove; 20. Avoidance space; 21. Guide groove. DETAILED DESCRIPTION

[0040] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] Example

[0042] A mold for producing a chain saw cylinder, referring to Figures 1 to 18 , including an upper mold 6, a lower mold 7, a positive mold core 8, a first oblique mold core 9 and a second oblique mold core 10. Two positive mold cores 8, first oblique mold cores 9 and second oblique mold cores 10 are axially symmetrically arranged. After the upper mold 6, the lower mold 7, two positive mold cores 8, two first oblique mold cores 9 and two second oblique mold cores 10 are molded together, two axially symmetrical molding chambers 11 are formed. Each molding chamber 11 can independently mold a chain saw cylinder 1. The two positive mold cores 8 are located on the opposite sides of the two molding chambers 11. The two positive mold cores 8 are close to each other for mold closing and are far away from each other for demolding without interference. Although the two second oblique mold cores 10 are tilted, they are far away from each other during demolding and will not interfere with each other.

[0043] There are only two first oblique mold cores 9. When demolding, the two first oblique mold cores 9 move axially along the air inlet 2 of the corresponding chain saw cylinder 1, and will approach each other in a "V" shape, which poses a risk of interference. In order to avoid interference, the distance between the two molding chambers 11 needs to be increased, resulting in an increase in the volume of the entire mold, an increase in occupied space, and an increase in production costs. Therefore, a linkage drive structure is provided so that the two first oblique mold cores 9 can approach or move away synchronously, and no interference occurs when approaching synchronously.

[0044] Since there is no interference problem between the positive mold core 8 and the second oblique mold core 10, this solution does not change the setting and driving method of the positive mold core 8 and the second oblique mold core 10, and the existing technology can be used. Therefore, the driving mechanism and driving method of the two are not shown in the figure and will not be repeated here.

[0045] The linkage drive structure includes a control block 12 that reciprocates along the symmetry axis of the two first oblique mold cores 9. Guide slots 13 are provided on both sides of the control block 12. The end of the first oblique mold core 9 away from the molding chamber 11 is embedded in the guide slots 13 and slides in cooperation. The two guide slots 13 are arranged in a "V" shape and the opening direction is opposite to the opening direction of the "V" shape formed by the two first oblique mold cores 9. The lower mold 7 is provided with a guide slot 21 for the first oblique mold core 9 to move in a straight line along the axial direction of the air inlet 2. The first oblique mold core 9 slides in cooperation with the guide slot 21 to ensure that the first oblique mold core 9 always moves in a straight line along the axial direction of the air inlet 2.

[0046] Through the cooperation of the guide groove 13 and the guide groove 21, the movement of the control block 12 along the symmetry axis of the two first inclined mold cores 9 is changed to the synchronous movement of the two first inclined mold cores 9 along the axial direction of the air inlet 2, and the movement space of each first inclined mold core 9 is only on one side of the control block 12, and no interference will occur.

[0047] A driving block 14 is fixed to the side of the control block 12 away from the molding chamber 11, and a limiting slide groove 15 is recessed on the upper mold 6 for the driving block 14 to be inserted and reciprocate along the symmetry axis of the two first oblique mold cores 9. The movement of the driving block 14 is controlled by a cylinder 16, the cylinder body of the cylinder 16 is fixed to the outside of the lower mold 7, and the piston rod of the cylinder 16 is fixedly connected to the driving block 14.

[0048] When the piston rod of the oil cylinder 16 extends to the maximum stroke, the driving block 14 moves to abut against the side of the limiting slide 15 close to the molding chamber 11, and the first oblique mold core 9 moves to the molding position of the air inlet 2 and stops at this position, which is the first extreme movement position; when the piston rod of the oil cylinder 16 retracts to the initial position, the driving block 14 moves to abut against the side of the limiting slide 15 away from the molding chamber 11, and the first oblique mold core 9 moves to completely leave the molding position of the air inlet 2 and stops at this position, which is the second extreme movement position. The first oblique mold core 9 has two extreme movement positions.

[0049] A receiving groove 19 is concavely provided on one side of the driving block 14 close to the control block 12, and the control block 12 is partially installed in the receiving groove 19. The receiving groove 19 is provided with an escape space 20 for the first oblique mold core 9 to move. The control block 12 is partially installed in the driving block 14, which reduces the volume of the control block 12 and the driving block 14 in the mold and the space required for the movement of the two, thereby further reducing the volume of the mold.

[0050] A guide structure for controlling the moving direction of the drive block 14 is arranged between the drive block 14 and the lower mold 7. The guide structure includes guide rails 17 arranged on both sides of the drive block 14 on the lower mold 7. The guide rails 17 are arranged parallel to the symmetry axes of the two first inclined mold cores 9. Guide blocks 18 are arranged on both sides of the control block 12. The guide blocks 18 are embedded and slidably matched with the guide rails 17 to ensure that the drive block 14 moves in a straight line along the symmetry axes of the two first inclined mold cores 9.

[0051] When the mold is closed, the upper mold 6 approaches the lower mold 7, and the two positive mold cores 8, the two first oblique mold cores 9 and the two second oblique mold cores 10 approach each other until two molding chambers 11 are formed after the mold is closed. In this process, the specific movement of the first oblique mold core 9 is as follows: the piston rod of the cylinder 16 extends to drive the drive block 14 and the control block 12 to move away from the cylinder, and through the cooperation of the guide groove 13 and the guide groove 21, the first oblique mold core 9 is driven to move along the axial direction of the air inlet 2 close to the molding position of the air inlet 2 until the piston rod of the cylinder 16 extends to the maximum stroke, the drive block 14 moves to abut against the side of the limiting groove 15 close to the molding chamber 11, and the piston rod of the cylinder 16 stops extending. At this time, the first oblique mold core 9 moves to the molding position of the air inlet 2 and remains stationary at this position waiting for casting.

[0052] When the mold is opened, the upper mold 6 moves away from the lower mold 7, and the two positive mold cores 8, the two first oblique mold cores 9 and the two second oblique mold cores 10 move away from the chainsaw cylinder 1 until the mold is opened. In this process, the specific movement of the first oblique mold core 9 is as follows: the piston rod of the oil cylinder 16 retracts to drive the control block 12 to move away from the chainsaw cylinder, driving the first oblique mold core 9 to move axially away from the molding position of the air inlet 2 along the air inlet 2 until the piston rod of the oil cylinder 16 retracts to the initial position, the drive block 14 moves to abut against the side of the limiting slide 15 away from the molding chamber 11, and the piston rod of the oil cylinder 16 stops retracting. At this time, the first oblique mold core 9 moves to completely leave the molding position of the air inlet 2 and rests at this position, completing the demolding.

[0053] During the above-mentioned mold opening and closing process, the driving mechanism and driving method of the upper mold 6, the two positive mold cores 8 and the two second inclined mold cores 10 are prior art and will not be described in detail here. The extension and retraction of the piston rod of the oil cylinder 16 is controlled by the control valve. The setting of the control valve and the way it controls the extension and retraction of the piston rod of the oil cylinder 16 are also prior art. It is not shown in the figure and will not be described in detail here. The switching timing of the control valve is controlled by the controller. The setting of the controller, the way and timing of controlling the switching of the control valve, and the way and timing of controlling the operation of the driving mechanism of the upper mold 6, the two positive mold cores 8 and the two second inclined mold cores 10 are all prior art and are not shown in the figure and will not be described in detail here.

[0054] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A mold for producing a chain saw cylinder, comprising an upper mold (6), a lower mold (7) and a first oblique mold core (9), wherein two first oblique mold cores (9) are axially symmetrically arranged, and characterized in that: The two first oblique mold cores (9) are synchronously moved toward or away from the air inlet (2) of the corresponding chain saw cylinder (1) in a "V" shape along the axial direction and are synchronously controlled by a linkage drive structure. The linkage drive structure includes a control block (12) that moves back and forth along the symmetry axis of the two first oblique mold cores (9), and guide slide grooves (13) opened on both sides of the control block (12) for the first oblique mold cores (9) to be embedded and slide. The two guide slide grooves (13) are arranged in a "V" shape and the opening direction is opposite to the opening direction of the "V" shape formed by the two first oblique mold cores (9). The first oblique mold core (9) has two extreme movement positions. When the first oblique mold core (9) is located at the two extreme movement positions, the first oblique mold core (9) moves to the air inlet (2) molding position or completely leaves the air inlet (2) molding position.

2. A mold for producing a chainsaw cylinder according to claim 1, characterized in that: A driving block (14) is fixed on the side of the control block (12) away from the air inlet (2) molding position, and a limiting slide groove (15) is recessed on the upper mold (6) for the driving block (14) to be inserted and reciprocate along the moving direction of the control block (12). When the driving block (14) moves to abut against the side of the limiting slide groove (15) close to the air inlet (2) molding position or abuts against the side of the limiting slide groove (15) away from the air inlet (2) molding position, the first inclined mold core (9) is in the two extreme movement positions.

3. A mold for producing a chainsaw cylinder according to claim 2, characterized in that: The movement of the driving block (14) is controlled by the oil cylinder (16), the cylinder body of the oil cylinder (16) is fixed to the outside of the lower mold (7) and the piston rod of the oil cylinder (16) is fixedly connected to the driving block (14).

4. A mold for producing a chainsaw cylinder according to claim 2, characterized in that: A guide structure for controlling the moving direction of the drive block (14) is provided between the drive block (14) and the lower die (7), the guide structure comprising guide rails (17) provided on both sides of the drive block (14) on the lower die (7) and guide blocks (18) provided on both sides of the control block (12) and embedded in and slidingly matched with the guide rails (17).

5. A mold for producing a chainsaw cylinder according to claim 2, characterized in that: A receiving groove (19) is recessed on one side of the driving block (14) close to the control block (12), the control block (12) is partially installed in the receiving groove (19), and an escape space (20) for the first inclined mold core (9) to move is provided on the receiving groove (19).

6. A mold for producing a chainsaw cylinder according to claim 1, characterized in that: The lower mold (7) is provided with a guide groove (21) for the first oblique mold core (9) to move linearly along the axial direction of the air inlet (2), and the first oblique mold core (9) is in sliding cooperation with the guide groove (21).

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