Inclined guide pillar sliding block inward shrinkage core-pulling structure

Abstract

The invention belongs to the field of automobile injection molds, and particularly relates to an inclined guide pillar sliding block inward shrinkage core-pulling structure which comprises an inclined guide pillar, a sliding block, a lateral pulling core, a pressing strip, a limiting block and a spring, first inclined grooves are formed in the two sides of the front portion of the sliding block, and the first inclined grooves in the two sides incline towards the middle of the sliding block from back to front; the two lateral loose cores are symmetrically arranged, one side of each lateral loose core is installed at the first inclined groove of the sliding block, the other side of each lateral loose core is located below the side edge of the front portion of the sliding block and protrudes out of the side edge of the front portion of the sliding block, the pressing strips are arranged on the two side edges of the sliding block, and the front portions of the pressing strips press the other sides of the lateral loose cores on the lower portions; the upper end of the inclined guide column inclines forwards and penetrates through the middle of the sliding block, the limiting block is located behind the sliding block, the spring is fixed to the middle of the lower side of the front end of the sliding block, and when the mold is opened, the inclined guide column drives the sliding block to retreat backwards, and meanwhile the two lateral pulling cores do horizontal lateral inward pulling movement. The inner side core pulling structure is completed in the mechanical form that the inclined guide column drives the sliding block, the occupied space is small, and the structure is stable.

Description

Technical Field

[0001] The invention belongs to the field of automobile injection molds, and in particular relates to an inclined guide column slider inwardly retracting core-pulling structure. Background Art

[0002] For plastic mold products with two undercuts in different directions on the inside, the slider-type two-way inclined top core pulling is currently widely used. Figure 1 As shown, due to the limitation of product features and the high size installation requirements of the inner hole, this type of structure is complex, occupies a large mold space, is inconvenient to disassemble and assemble, is easy to damage, and the mold cost is relatively high. At present, there is an urgent need for a method with stable structure, convenient disassembly and assembly, good product quality, and relatively low price to solve this problem. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides an inclined guide pin slider retracting core pulling structure, which is completed by the mechanical form of the inclined guide pin driving the slider, occupies a small space and has a stable structure.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an inclined guide column slider retracting core pulling structure, comprising an inclined guide column, a slider, a lateral core pulling, a pressure strip, a limit block and a spring, an inclined groove one is provided on both sides of the front portion of the slider, and the inclined grooves on both sides are inclined from rear to front toward the middle of the slider, the lateral core pulling is arranged as two symmetrical ones and one side of it is installed at one of the inclined grooves of the slider, the other side of the lateral core pulling is located below the side edge of the front portion of the slider and protrudes outside the side edge of the front portion of the slider, the pressure strip is arranged on both sides of the slider and the front of the pressure strip presses the other side of the lateral core pulling underneath, the upper end of the inclined guide column is inclined forward and passes through the middle of the slider, the limit block is located behind the slider, and the spring is fixed in the middle of the lower side of the front end of the slider. When the mold is opened, the inclined guide column drives the slider to retreat while the two lateral core pullings make a horizontal lateral inward pulling movement until the slider is blocked by the limit block, and the slider and the two lateral core pullings stop moving.

[0005] Furthermore, an inclined surface 1 is formed on the inner sides of the two inclined grooves, and an inclined draw surface is formed on the outer sides. The upper inclined surface 1 of the inclined groove on one side is consistent with the inclined draw surface inclination angle. A protrusion 1 is arranged on both sides of the slider. The height of the protrusion 1 is lower than the middle of the slider. A groove 1 is provided on the lower front side of the protrusion 1, and an inclined hole adapted to the inclined guide column is provided in the middle of the slider.

[0006] Furthermore, a side surface of the lateral core pulling device is provided with a slope 2 matching the slope 1, a convex shaft is provided on one side of the front end of the lateral core pulling device, a convex block 2 matching the groove 1 is provided on the lower rear side of the lateral core pulling device, and an inclined groove 2 matching the front part of the convex block 1 is provided above the convex block 2 on the lateral core pulling device.

[0007] Furthermore, a convex strip is arranged at the bottom of one side of the pressure strip, and a second groove matching with the second convex block is arranged at one end of the pressure strip.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts an inclined guide column and a spring to jointly drive the slider, so that the slider retreats horizontally, and at the same time, the lateral core pulling performs a horizontal lateral inward pulling movement under the action of the inclined pulling surface on the slider, so that the lateral core pulling is withdrawn from the undercut on the product, so as to solve the problem of the mold not needing to design a complex slider-type bidirectional inclined top core pulling structure, and this mechanical form is easy to install, simple and stable in structure, which solves the problem of production stability and more convenient maintenance; the present invention occupies a small space, is easy to disassemble and assemble, and has a low mold cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the prior art structure;

[0010] Figure 2 This is a schematic diagram of the structure when the present invention is installed on a product;

[0011] Figure 3 This is an exploded diagram of the present invention and product;

[0012] Figure 4 This is a schematic diagram of the structure when the lateral core pulling device of the present invention is installed on a product;

[0013] Figure 5 It is a structural schematic diagram of the side core pulling device of the present invention when it is installed on a product after being matched with a slider;

[0014] Figure 6 This is a schematic diagram of the structure of the present invention when the product is withdrawn and then turned upside down;

[0015] Figure 7 This is a bottom view of the product of the present invention when it is turned upside down;

[0016] Figure 8 for Figure 7 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1In the prior art, there are two undercuts 11 in different directions on the inside of a plastic mold product 1. The two undercuts 11 are in different directions but on the same straight line. Currently, two inclined tops 8 are generally used to cooperate with sliders 1 9 and 10 to complete the undercuts 11 in different directions on the inside. The entire mold structure is complex, occupies a large mold space, is inconvenient to disassemble and assemble, is easy to damage, and the mold cost is relatively high. At present, there is an urgent need for a method with stable structure, convenient disassembly and assembly, good product quality, and relatively low price to solve this problem.

[0019] See also Figure 2-8 The present invention provides the following technical solutions: an inclined guide column slider retracting core pulling structure, comprising an inclined guide column 2, a slider 3, a lateral core pulling 4, a pressure strip 5, a limit block 6 and a spring 7, an inclined groove 31 is provided on both sides of the front of the slider 3, and the inclined grooves 31 on both sides are inclined from the back to the front toward the middle of the slider 3, and the lateral core pulling 4 is set to be symmetrical and one side of the lateral core pulling 4 is installed at the inclined groove 31 of the slider 3, and the two lateral core pulling 4 are symmetrically arranged in the two inclined grooves 31 on the slider 3, and then the lateral core pulling 4 The front end outer side of the product 1 contacts the undercut 11 on the product 1. The front ends of the two lateral core pulls 4 and the front end of the slider 3 are initially flush. The other side of the lateral core pulls 4 is located below the side of the front part of the slider 3 and protrudes outside the side of the front part of the slider 3. The pressure strip 5 is arranged on both sides of the slider 3 and the front of the pressure strip 5 presses the other side of the lateral core pull 4 underneath. It is the outer side of the pressure strip 5 that presses the other side of the lateral core pull 4 underneath. This is to prevent the lateral core pull 4 from moving backwards, but the pressure strip 5 does not prevent the slider 3 from retreating. The upper end of the inclined guide column 2 is inclined forward and passes through the middle of the slider 3. When the inclined guide column 2 moves vertically upward, the inclined guide column 2 will push the slider 3 to move backward, but the lateral core pulling 4 is blocked by the pressure strip 5 and will not be driven to move backward. Since the inclined grooves 31 on both sides of the front of the slider 3 are inclined toward the middle of the slider 3, when the slider 3 moves backward, the lateral core pulling 4 on both sides will be pushed by the two sides of the slider 3 to move horizontally toward the middle of the slider 3. During this process, the lateral core pulling 4 is always in contact with the two side surfaces of the inclined groove 31 on the slider 3, and the limit block 6 is located behind the slider 3. The slider 3 will be blocked by the limit block 6 after moving backward for a distance. The spring 7 is fixed in the middle of the lower front end of the slider 3. The spring 7 is compressed by the mold when it is initially installed. When the mold is opened, the spring 7 has the force to push the slider 3 backward. At the same time, the inclined guide column 2 is driven to move upward, so that the inclined guide column 2 also drives the slider 3 to retreat. At the same time, the two lateral core pullers 4 make horizontal lateral inward pulling movements until the slider 3 is blocked by the limit block 6, and the slider 3 and the two lateral core pullers 4 stop moving.

[0020] Specifically, inclined surfaces 32 are formed on the inner sides of the two inclined grooves 31, and inclined draw surfaces 35 are formed on the outer sides. The inclined surface 32 and the inclined draw surface 35 on the inclined groove 31 on one side have the same inclination angle, and the inclination angles of the inclined surface 32 and the inclined draw surface 35 are both 8°. Bumps 34 are arranged on both sides of the slider 3. The inclined draw surface 35 is the side surface of the front part of the bump 34, so the front part of the bump 34 is inclined from back to front toward the middle of the slider 3, and the outer side surface of the bump 34 is straight without inclination. The height of the bump 34 is lower than the middle of the slider 3, and a groove 33 is provided on the lower side of the front part of the bump 34. An inclined hole 36 matched with the inclined guide column 2 is provided in the middle of the slider 3, and the inclined guide column 2 runs through the inclined hole 36.

[0021] Specifically, a side surface of the lateral core pulling 4 is provided with a slope 2 43 matching the slope 1 32, and the inclination angle of the slope 2 43 is also 8°. A convex shaft 41 is provided on one side of the front end of the lateral core pulling 4, and the convex shaft 41 is inserted into the undercut 11 in the product 1. A convex block 2 44 matching the groove 1 33 is provided on the lower rear side of the lateral core pulling 4. An inclined groove 2 45 matching the front part of the convex block 1 34 is provided above the convex block 2 44 on the lateral core pulling 4, and the inclination angle of the inclined groove 2 45 is also 8°. After one side of the lateral core pulling 4 is installed in the inclined groove 1 31, the slope 1 32 is tightly attached to the slope 2 43, the side edge of the front part of the convex block 1 34 is inserted into the inclined groove 2 45, and the convex block 1 44 passes through the groove 1 33 below the front part of the convex block 1 34.

[0022] Specifically, a convex strip 52 is provided at the bottom of one side of the pressure strip 5, and the convex strip 52 is pressed on the outer side of the protrusion 1 34. The pressure strip 5 only limits the upper and lower positions of the slider 3, and does not block the slider 3 from moving forward and backward. A groove 2 51 adapted to the protrusion 2 44 is provided at one end of the pressure strip 5, and the outer side of the protrusion 2 44 is located in the groove 2 51. Since the pressure strip 5 is fixed, the pressure strip 5 limits the front and rear positions of the protrusion 2 44, and does not block the lateral movement of the lateral core pulling 4.

[0023] The installation and movement process of the present invention is as follows: first, the two lateral core pullers 4 are obliquely installed into the oblique grooves 31 on both sides of the slider 3 through internal movement. At this time, the two lateral core pullers 4 are symmetrical, and the spring 7 is installed in the middle of the lower front end of the slider 3. Then, the convex strips 52 on the pressure strip 5 are in contact with the outer edges of the protrusions 34 on both sides of the slider 3 and the protrusions 44 are set in the grooves 51. Then, the whole is fixed to the rear mold through the pressure strip 5 screws. At this time, the spring 7 is compressed, and then the limit block 6 is also fixed to the rear mold. Finally, the oblique guide column 2 is passed through the oblique hole 36 in the middle of the slider 3 and the oblique guide column 3 is installed in the front mold. In this way, the assembly is completed. Movement analysis: When the mold is opened, that is, it moves vertically upward, the inclined guide pillar 2 is fixed to the front mold, so it moves upward together. At this time, the slider 3 retreats horizontally under the joint drive of the inclined guide pillar 2 and the spring 7. Since the front inner sides of the protrusions 34 on both sides of the slider 3 are inclined from back to front toward the middle of the slider 3, the front inner side of the protrusion 34 is an inclined drawing surface 35, which is inclined 8° toward the middle. The inclined drawing surface 35 is in close contact with the side of the inclined groove 2 45 on the lateral core pulling 4, so the slider 3 retreats to make the inclined drawing The surface 35 follows the retreat, so that the inclined surfaces 35 on both sides respectively push the lateral core pullers 4 on both sides to move laterally and move laterally toward the middle of the slider 3. During this process, the two sides of the inclined groove 32 on both sides of the slider 3 are always in close contact with the lateral core pullers 4. When the slider 3 continues to move for a distance, the slider 3 is limited by the rear limit block 6, and the slider 3 and the lateral core pullers 4 on both sides stop moving. At this time, the lateral core pullers 4 on both sides move 1.8mm to the middle respectively, and the convex shaft 41 withdraws from the undercut 11 in the product 1. The present invention has a simple structure, few parts, occupies a small mold space, is easy to disassemble and assemble, and is not easy to damage.

[0024] When there are two undercuts 11 in different directions on the inner side of the product 1, the present invention can solve the problems of complex molds and high requirements for product installation holes, avoid wasting the cost of mold production and manufacturing, and avoid expensive costs such as the cost of mold modification in the later stage.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inclined guide column and slider retracting core pulling structure, comprising an inclined guide column (2), a slider (3), a lateral core pulling (4), a pressure strip (5), a limit block (6) and a spring (7), characterized in that: The two sides of the front of the slider (3) are provided with an inclined groove (31), and the inclined grooves (31) on both sides are inclined from the back to the front toward the middle of the slider (3). The side core pullers (4) are arranged as two symmetrical ones and one side of the side core pullers is installed at the inclined groove (31) of the slider (3). The other side of the side core pullers (4) is located below the side edge of the front of the slider (3) and protrudes outside the side edge of the front of the slider (3). The pressure strip (5) is arranged on the two side edges of the slider (3) and the front of the pressure strip (5) is used to pull the side core pullers. The other side of the core (4) is pressed downward, the upper end of the inclined guide column (2) is tilted forward and passes through the middle of the slider (3), the limit block (6) is located behind the slider (3), and the spring (7) is fixed in the middle of the lower front end of the slider (3). When the mold is opened, the inclined guide column (2) drives the slider (3) to retreat while the two lateral core pullers (4) perform horizontal lateral inward pulling movement until the slider (3) is blocked by the limit block (6), and the slider (3) and the two lateral core pullers (4) stop moving.

2. The inward-retracting core-pulling structure of the inclined guide column slider according to claim 1 is characterized in that: The two inner sides of the two inclined grooves (31) form inclined surfaces (32) and the outer sides form inclined draw surfaces (35); the inclined surfaces (32) and the inclined draw surfaces (35) on the inclined groove (31) on one side have the same inclination angle; a convex block (34) is arranged on both sides of the slider (3); the height of the convex block (34) is lower than the middle of the slider (3); a groove (33) is arranged on the lower side of the front of the convex block (34); and an inclined hole (36) adapted to the inclined guide column (2) is arranged in the middle of the slider (3).

3. The inclined guide column slider retracting core pulling structure according to claim 2 is characterized in that: A side surface of the lateral core pulling (4) is provided with a second inclined surface (43) matching with the first inclined surface (32); a convex shaft (41) is provided on one side of the front end of the lateral core pulling (4); a convex block (44) matching with the first groove (33) is provided on the lower rear side of the lateral core pulling (4); and a second inclined groove (45) matching with the front of the first convex block (34) is provided above the second convex block (44) of the lateral core pulling (4).

4. The inward-retracting core-pulling structure of the inclined guide column slider according to claim 3 is characterized in that: A convex strip (52) is arranged at the bottom of one side of the pressure strip (5), and a second groove (51) matching with the second convex block (44) is arranged at one end of the pressure strip (5).

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