Mould fixed die slide cylinder anti-retraction device

Abstract

The utility model relates to a mold fixed mold slider oil cylinder anti-retraction device, which belongs to the field of plastic mold technology. The slider is divided into a first body, a second body and a slider head. A travel gap is reserved between the second body and the slider seat. The other side of the slider seat is a pad and a cylinder in sequence. The second body is provided with an anti-retraction groove and a sliding groove. The anti-retraction groove is connected with the sliding groove and a step is provided in the middle of the sliding groove. The anti-retraction block is installed in the anti-retraction groove. The end A of the linkage block extends into the sliding groove. The push surface of the end A of the linkage block and the inner wall of the second body are reserved with a travel space. The connecting rod of the cylinder passes through the pad and is connected to the end B of the linkage block that passes through the slider seat. The second body is also provided with connecting grooves on both sides. The spring is located in the connecting groove and one end of the spring is connected to the anti-retraction block, and the other end of the spring is connected to the auxiliary block. The auxiliary block is fixed to the side wall of the second body by a fastening screw. The problem of burrs on the undercut product caused by the slider retreating during opening and closing the mold is solved.

Description

Technical Field

[0001] The utility model relates to a mold fixed mold slide block oil cylinder anti-retraction device, belonging to the technical field of plastic molds. Background Art

[0002] In order to meet the use and assembly requirements of the product, plastic products will be designed with shapes in different directions. When the mold is opened, the fixed mold and the movable mold are separated to remove the plastic product. When the product has an undercut position that is different from the opening and closing direction, a slider is usually used to achieve this. When the mold is opened, the slider is driven by the oil cylinder to detach from the product undercut position, and when the mold is closed, the slider is driven to reset to participate in the injection molding of the product. In mold manufacturing, for the movement of the product fixed mold slider, under normal circumstances, the ordinary mold structure can achieve smooth demolding. However, for special products, the slider needs to move in an inclined direction. When the injection pressure is instantaneously transmitted and is greater than the cylinder support force, the slider is prone to slight retreat, resulting in the existence of defective problems such as breakage and burrs in the undercut product, affecting the product defect rate. The Chinese patent with publication number CN207723462U discloses a device to prevent the oil cylinder slider in the mold from retreating. By adding an anti-retreat oil cylinder, the anti-retreat oil cylinder drives the anti-retreat oblique pin to cooperate with the core-pulling fixed seat to achieve anti-retreat. This solution will undoubtedly increase the mold cost by increasing the number of oil cylinders used. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model sets an anti-recoil block, a linkage block, a spring, an auxiliary block and a slider to solve the problem that the slider retreats under the injection pressure and causes undercut products to have burrs, breakage and other defects, thereby avoiding the cost of subsequent repairs.

[0004] The technical scheme adopted by the utility model is a mold fixed die slider oil cylinder anti-recoil device, comprising a slider, a slider seat, an anti-recoil block, a linkage block, a spring, an auxiliary block and an oil cylinder; the slider is divided into a first body, a second body and a slider head, the slider head is located at one end of the first body, the other end of the first body is the second body, a travel gap is reserved between the second body and the slider seat, the other side of the slider seat is a pad and an oil cylinder in sequence, the second body is provided with an anti-recoil groove and a sliding groove, the anti-recoil groove is connected with the sliding groove and a step is provided in the middle of the sliding groove, the anti-recoil block is installed in the anti-recoil groove, the linkage block A end extends into the sliding groove, the linkage block A end width is greater than the step spacing, the push surface of the linkage block A end and the inner wall of the second body are reserved with a travel space, the connecting rod of the oil cylinder passes through the pad and is connected to the linkage block B end that passes through the slider seat, the second body is also provided with connecting grooves on both sides, the spring is located in the connecting groove and one end of the spring is connected to the anti-recoil block, the other end of the spring is connected to the auxiliary block, and the auxiliary block is fixed to the side wall of the second body by fastening screws.

[0005] Furthermore, the travel space length is not greater than the travel gap length.

[0006] Furthermore, the inner side of the anti-retreat block has an extrusion surface and a guide surface, and the connection between the push surface on both sides of the A end of the linkage block and the outer side surface has a longitudinal rectangular section, the longitudinal rectangular section is parallel to the guide surface, and when the A end of the linkage block contacts the anti-retreat block during the mold closing process, as the linkage block continues to move, the longitudinal rectangular section first squeezes the guide surface of the anti-retreat block backward, and then the outer side surface of the linkage block contacts the extrusion surface of the anti-retreat block.

[0007] Furthermore, when the end A of the linkage block contacts the inner wall of the second body, the inner wall of the second body is tightly fitted with the push surface of the end A of the linkage block and the longitudinal rectangular sections on both sides.

[0008] Furthermore, a first pressing block is provided above the slider seat and is fixed by a first screw, and second pressing blocks are provided at both ends of the pad and are fixed by a second screw.

[0009] Furthermore, the first body is provided with guide rails on both sides, and the pressure strip is installed on the guide rails and fixed by third screws.

[0010] Furthermore, a limit switch is connected above the slider seat.

[0011] The utility model discloses a mold fixed die slider oil cylinder anti-retraction device, which has the beneficial effect that compared with the prior art, an anti-retraction block, a linkage block, a spring, an auxiliary block and a slider are arranged to cooperate, thereby solving the problem of burrs on undercut products caused by the slider retreating during mold opening and closing under injection pressure, and improving the stability of mechanical transmission of various components during mold opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 Shown is a schematic diagram of the structure decomposition of the utility model;

[0014] Figure 2 Shown Figure 1 A partial schematic diagram of

[0015] Figure 3 The figure shows the schematic diagram of the mold opening state;

[0016] Figure 4 The figure shows the mold closing state.

[0017] As shown in the figure: 1. Slider head; 2. First body; 3. Second body; 4. Slider seat; 5. Anti-retraction block; 6. Linkage block; 7. Spring; 8. Auxiliary block; 9. Cylinder; 10. Pad; 11. First pressure block; 12. First screw; 13. Second pressure block; 14. Second screw; 15. Pressure strip; 16. Third screw; 17. Limit switch; 18. Stroke gap; 19. Stroke space; 20. Guide rail; 21. Connecting rod; 22. Fastening screw; 31. Anti-retraction groove; 32. Sliding groove; 33. Connecting groove; 34. Step; 35. Inner wall; 51. Extrusion surface; 52. Guide surface; 61. Push surface; 62. Longitudinal rectangular section; 63. Outer side surface; 100. Undercut product. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] In order to further understand the content of the utility model, this technical solution is further explained below in conjunction with specific implementation methods.

[0020] Example 1: Figures 1 to 4As shown, the present embodiment provides a mold fixed die slider cylinder anti-retraction device, including a slider, a slider seat 4, an anti-retraction block 5, a linkage block 6, a spring 7, an auxiliary block 8 and an oil cylinder 9; the slider is divided into a first body 2, a second body 3 and a slider head 1, the slider head 1 is located at one end of the first body 2, the other end of the first body 2 is the second body 3, a travel gap 18 is reserved between the second body 3 and the slider seat 4, the other side of the slider seat 4 is a pad 10 and an oil cylinder 9, the second body 3 is provided with an anti-retraction groove 31 and a sliding groove 32, the anti-retraction groove 31 is connected with the sliding groove 32, and a step 34 is provided in the middle of the sliding groove 32 , the anti-retraction block 5 is installed in the anti-retraction groove 31, the A end of the linkage block 6 extends into the sliding groove 32, the width of the A end of the linkage block 6 is greater than the spacing of the steps 34, and the push surface 61 of the A end of the linkage block 6 and the inner wall 35 of the second body 3 reserve a stroke space 19, the connecting rod 21 of the oil cylinder 9 passes through the pad 10 and is connected to the B end of the linkage block 6 that passes through the slider seat 4, and the second body 3 is also provided with a connecting groove 33 on both sides, the spring 7 is located in the connecting groove 33 and one end of the spring 7 is connected to the anti-retraction block 5, and the other end of the spring 7 is connected to the auxiliary block 8, and the auxiliary block 8 is fixed to the side wall of the second body 3 by a fastening screw 22. The length of the stroke space 19 is equal to the length of the stroke gap 18. When the anti-retraction block 5 is not squeezed by the linkage block 6, the spacing between the two anti-retraction blocks 5 is slightly greater than the width of the A end of the linkage block 6, that is, it is sufficient to meet the requirement that the linkage block 6 can normally extend between the two anti-retraction blocks 5. Normally, the clearance between the rectangular anti-recoil block 5 and the linkage block 6 can meet the requirements, but considering the extremely special situation that the anti-recoil block 5 is offset, that is, the linkage block 6 cannot extend from between the two anti-recoil blocks 5, and the mold cannot be opened and closed normally. In order to facilitate the better mechanical transmission coordination between the linkage block 6 and the anti-recoil block 5, the spring 7, and the auxiliary block 8, further, the inner side of the anti-recoil block 5 is provided with an extrusion surface 51 and a guide surface 52, and the connection between the push surface 61 of the A end of the linkage block 6 and the outer side surface 63 on both sides has a longitudinal rectangular section 62, and the longitudinal rectangular section 62 is parallel to the guide surface 52, and when the A end of the linkage block 6 contacts the anti-recoil block 5 during the mold closing process, as the linkage block 6 continues to move, first the longitudinal rectangular section 62 squeezes the guide surface 52 of the anti-recoil block 5 backward, and then the outer side surface 63 of the linkage block 6 contacts the extrusion surface 51 of the anti-recoil block 5. When the end A of the linkage block 6 contacts the inner wall 35 of the second body 3 , the inner wall 35 of the second body 3 is tightly fitted with the push surface 61 of the end A of the linkage block 6 and the longitudinal rectangular sections 62 on both sides.

[0021] A first pressing block 11 is provided on the top of the slider seat 4 and fixed by a first screw 12, and second pressing blocks 13 are provided at both ends of the backing plate 10 and fixed by a second screw 14. Guide rails 20 are provided on both sides of the first body 2, and a pressure strip 15 is installed on the guide rail 20 and fixed by a third screw 16. The slider seat 4, the backing plate 10, and the slider are controlled to move smoothly during the movement by the first pressing block 11, the second pressing block 13, and the pressure strip 15.

[0022] The upper part of the slider seat 4 is connected with a limit switch 17, and the movement stroke of each component is accurately controlled by the limit switch 17 during the mold opening or mold closing process.

[0023] During the actual operation, when the mold needs to be closed, the injection molding machine drives the cylinder 9 to move, and the cylinder 9 drives the pad 10 and the slider seat 4 to move. When the forward stroke is 26 mm, the A end of the linkage block 6 begins to contact the anti-retraction block 5, that is, the longitudinal rectangular section 62 begins to squeeze the guide surfaces 52 of the anti-retraction blocks 5 on both sides to retreat, and the anti-retraction block 5 retreats while compressing the spring 7. Then the outer side surface 63 of the linkage block 6 begins to contact and squeeze the extrusion surface 51 of the anti-retraction block 5. When the A end of the linkage block 6 contacts the inner wall 35 of the second body 3, the inner wall 35 of the second body 3 is tightly fitted with the push surface 61 of the A end of the linkage block 6 and the longitudinal rectangular sections 62 on both sides. At this time, the mold is closed and pressure injection molding begins. The extrusion surface 51 of the anti-retraction block 5 presses against the linkage At the A end of the block 6, a spring 7 is provided to connect with the anti-retraction block 5 to squeeze the linkage block 6, so as to prevent the slider from retreating under the injection pressure. At the same time, the spring 7 plays a buffering role to avoid damage to the product. After injection molding, the mold is opened. When the mold is opened, the injection molding machine provides power to drive the oil cylinder 9 to retreat. The oil cylinder 9 drives the linkage block 6 and the slider to retreat. When the linkage block 6 retreats 10mm, the compressed spring 7 drives the anti-retraction block 5 to reset together, so that the spring 7 can accurately move and reset the anti-retraction block 5, and can play a precise movement role. The linkage block 6 continues to retreat with the oil cylinder 9. When the A end of the linkage block 6 contacts the step 34, the mold opening is completed, and the undercut product 100 is completely removed. The specific structure and shape of the slider head 1 are designed according to the requirements of the undercut product 100. During the whole process, the limit switch 17 accurately controls the travel distance of each component. In addition, the A end of the linkage block 6 is designed with a longitudinal rectangular section 62, and the anti-retraction block 5 is designed with an extrusion surface 51 and a guide surface 52, so that the linkage block 6 is convenient to advance and retreat when the mold is opened or closed.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. The mold fixed die slide cylinder anti-retraction device is characterized by: The invention comprises a slider, a slider seat (4), an anti-recoil block (5), a linkage block (6), a spring (7), an auxiliary block (8) and an oil cylinder (9); the slider is divided into a first body (2), a second body (3) and a slider head (1); the slider head (1) is located at one end of the first body (2); the other end of the first body (2) is the second body (3); a travel gap (18) is reserved between the second body (3) and the slider seat (4); the other side of the slider seat (4) is provided with a pad (10) and an oil cylinder (9); the second body (3) is provided with an anti-recoil groove (31) and a sliding groove (32); the anti-recoil groove (31) is connected to the sliding groove (32) and a step (34) is provided in the middle of the sliding groove (32); the anti-recoil block (5) is installed at In the anti-recoil groove (31), the A end of the linkage block (6) extends into the sliding groove (32), the width of the A end of the linkage block (6) is greater than the spacing of the steps (34), and a travel space (19) is reserved between the push surface (61) of the A end of the linkage block (6) and the inner wall (35) of the second body (3). The connecting rod (21) of the oil cylinder (9) passes through the pad (10) and is connected to the B end of the linkage block (6) that passes through the slider seat (4). The second body (3) is also provided with connecting grooves (33) on both sides, the spring (7) is located in the connecting groove (33) and one end of the spring (7) is connected to the anti-recoil block (5), and the other end of the spring (7) is connected to the auxiliary block (8), and the auxiliary block (8) is fixed to the side wall of the second body (3) by a fastening screw (22).

2. The mold fixed die slide cylinder anti-retraction device according to claim 1 is characterized in that: The length of the stroke space (19) is not greater than the length of the stroke gap (18).

3. The mold fixed die slide cylinder anti-retraction device according to claim 2 is characterized in that: The anti-recoil block (5) has an extrusion surface (51) and a guide surface (52) on its inner side, and the connection between the two sides of the push surface (61) of the A end of the linkage block (6) and the outer side surface (63) has a longitudinal rectangular section (62), the longitudinal rectangular section (62) is parallel to the guide surface (52), and when the A end of the linkage block (6) contacts the anti-recoil block (5) during the mold closing process, as the linkage block (6) continuously moves, the longitudinal rectangular section (62) firstly presses the guide surface (52) of the anti-recoil block (5) to retreat, and then the outer side surface (63) of the linkage block (6) contacts the extrusion surface (51) of the anti-recoil block (5).

4. The mold fixed die slide cylinder anti-retraction device according to claim 3 is characterized in that: When the end A of the linkage block (6) contacts the inner wall (35) of the second body (3), the inner wall (35) of the second body (3) and the push surface (61) of the end A of the linkage block (6) and the longitudinal rectangular sections (62) on both sides are tightly fitted.

5. The mold fixed die slide cylinder anti-retraction device according to any one of claims 1 or 3, characterized in that: A first pressing block (11) is provided above the slider seat (4) and is fixed by a first screw (12), and second pressing blocks (13) are provided at both ends of the pad (10) and are fixed by a second screw (14).

6. The mold fixed die slide cylinder anti-retraction device according to claim 5, characterized in that: The first body (2) has guide rails (20) on both sides, and the pressure strip (15) is installed on the guide rails (20) and fixed by a third screw (16).

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