CN107813465B - Precision grade inclined sliding mold release mechanism - Google Patents

Abstract

The precision level inclined sliding mold release mechanism belongs to the field of thermoplastic molding molds. It is mainly used in the molding molds of plastic products with precision fitting ports or small-area undercuts. Friction is generated through the wedge fit between the push rod (20) and the sliding block (23) The locking force and the frictional locking force generated by the wedging of the sliding block (23) and the guide sleeve B (22) realize the sliding of the upper floating plate (5) and the lower floating plate (6) during the mold opening process. The sliding of the upper floating plate (5) and the lower floating plate (6) realizes the movement of the first inclined sliding rod (11) and the second inclined sliding rod (12), so that the undercut in the plastic product can be demoulded smoothly, and the precision guide The combination of the column (7) and the precision guide bush (8) ensures the accuracy of the sliding track of the oblique sliding part. This mechanism simplifies the mold structure, reduces the mold and production costs, and realizes oblique sliding mold release by using the force generated by the mold opening Avoid the increase in cost of the peripheral drive mechanism, work stably and reduce the defect rate in mass production, so that the product meets the technical requirements and use requirements, and improves production efficiency.

Description

Precision grade inclined sliding mold release mechanism

technical field

The invention belongs to the field of molding molds for thermoplastic plastics, and relates to a precision-level oblique sliding mold release mechanism, which is mainly applied to molding molds for plastic products with precision matching ports or small-area undercuts.

Background technique

At present, with the continuous economic growth, the price of metal is expensive and the processing cost is high. With the continuous improvement of the performance of engineering plastics, it has become an international trend to replace metal materials with plastics. The scope of use of plastic products continues to expand and is widely used in electronics, automobiles, Various industries such as construction, mechanical equipment, new energy and transportation. Some of these precision-grade functional plastic products are not only complex in structure but also require high precision. For plastic products with precision fitting ports or small-area undercuts, the traditional mold structure generally uses a strong release mechanism or a slider mechanism to achieve demoulding, which cannot guarantee precision fit. The appearance and precision of plastic products that are undercut in ports or small areas.

Contents of the invention

The purpose of the present invention is to provide a precision-level oblique sliding mold release mechanism, which uses frictional locking force to promote the first movement of the floating plate during the mold opening process, and realizes the sliding of the oblique sliding rod to promote the smooth demoulding of the fixed mold part with undercuts.

The technical problem to be solved by the present invention is to provide a precision-level oblique slide demoulding mechanism, which solves the problems existing in the forming mold of plastic products with precision matching ports or small area undercuts, so that the product can be demolded smoothly and meet the technical requirements and usage requirements. Require.

The technical solution of the present invention is: a precision grade inclined slide demoulding mechanism whose structure includes: a hot runner plate 1, a push plate 2, a fixed plate 3, a movable plate 4, an upper floating plate 5, a lower floating plate 6, a precision guide column 7, a precision Guide sleeve 8, upper fixed plate 9, lower fixed plate 10, first inclined slide bar 11, second inclined slide bar 12, small shaft 13, roller 14, fixed pin 15, support column 16, fixed mold insert 17, fixed Die insert 18, pressure plate 19, push rod 20, guide sleeve A21, guide sleeve B22, sliding block 23, limit pin 24, positioning bolt 25; the connection relationship of the precision grade oblique slide demoulding mechanism is: push plate 2 and The 3-side contact of the fixed template is locked and fixed by bolts, and the contact between the upper floating plate 5 and the lower floating plate 6 is fixed by bolts. The upper floating plate 5 and the lower floating plate 6 are in clearance fit with the upper cavity set on the fixed template 3, the precision guide sleeve 8 is in contact with the upper floating plate 5 and closely matched with the hanging platform, and the precision guide sleeve 8 is in contact with the lower floating plate 6 Tight fit, precision guide post 7 and precision guide sleeve 8 surface contact sliding fit, precision guide post 7 and fixed template 3-side contact interference fit are connected by hanging table, the head of precision guide post 7 protrudes from the precision guide sleeve in the closed mold state 8. The protruding part of the head of the precision guide post 7 cooperates with the guide post provided on the push plate 2 to give way to the clearance, the upper fixed plate 9 and the lower fixed plate 10 are in contact with each other and fixed by bolts, and the upper floating plate 5 is fixed with the upper fixed plate 5. The plate 9 is in contact with each other, and the precision level slanting slide release mechanism includes two slanting rod combinations. The first slanting rod combination is composed of a small shaft 13, two rollers 14 and the first slanting rod 11. The second slanting rod The combination consists of a small shaft 13, two rollers 14 and a second slanting rod 12. The roller 14 is cylindrical in shape and has a shaft hole in its central hole. The two rollers 14 are distributed on both sides of the first slanting rod 11. And it is closely matched with the surface of the first inclined slide bar 11, the small shaft 13 is in close contact with the shaft hole surface provided on the two rollers 14, and the small shaft 13 is closely matched with the shaft hole surface provided on the first inclined slide bar 11 ; The combined connection relationship of the second slanted slide bar is the same as that of the first slanted slide bar; the lower floating plate 6 is provided with a counterbore and a through cavity, and the first slanted slide bar 11 and the second slanted slide bar 12 are connected with the lower floating plate The through cavity provided on the plate 6 is in clearance fit, and the roller 14 is in contact with the counterbore surface of the hanging platform provided on the lower floating plate 6. The support column 16 is in clearance fit with the upper floating plate 5 and the lower floating plate 6. It is in contact with the 2 sides of the push plate, the lower surface of the support column 16 is in contact with the 3 sides of the fixed template and is fixed by bolt locking, the fixed mold insert 17 is in contact with the 3 sides of the fixed template and is fixed by bolt locking, the fixed mold insert 18 is in contact with the fixed mold insert The block 17 is in surface contact and tightly matched with the hanging platform; the first slanting rod 11 and the second slanting rod 12 are in surface contact and sliding fit with the fixed mold insert 18, and the upper surface of the pressure plate 19 is in surface contact with the hot runner plate 1 to limit its position , the gap between the pressure plate 19 and the push plate 2 is fixed by bolt locking, the upper surface of the push rod 20 is in contact with the surface of the pressure plate 19 and its position is limited, the push rod 20 is in contact with the surface of the push plate 2 and closely matched with the hanging table connection, the push rod 20 Sliding fit with the surface of the guide sleeve A21, the center of the guide sleeve A21 is provided with a through hole. The direction is perpendicular to the axial direction of the guide sleeve A21, the square through hole is divided into two parts by the through hole provided on the guide sleeve A21, and the bottom surface of the divided square through hole is respectively provided with a pin hole, and the pin hole and The limit pin 24 is in close contact with each other, the bottom of the pin hole is provided with a screw hole, the positioning bolt 25 is threaded with the guide sleeve A21, the positioning bolt 25 is in contact with the limit pin 24 and is limited, the second layer of cylindrical steps and The 3 sides of the fixed template are in contact with sliding fit, the upper surface of the guide sleeve A21 is in contact with the 5 sides of the upper floating plate to limit its position, and the guide sleeve A21 is in contact with the 6 sides of the lower floating plate to closely cooperate with the hanging table connection; Two sliding blocks 23, the sliding block 23 is provided with six faces, two faces perpendicular to the direction of motion in the six faces are cylindrical faces, and the rest of the faces are planes, and the cylinder positioned on the inside of the cylindrical faces The diameter of the surface is the same as that of the push rod 20. The edges and corners of the sliding block 23 are provided with chamfers. In the closed mold state, the limit pin 24 cooperates with the elliptical counterbore provided on the sliding block 23. During the mold opening process, the sliding block 23 slides, and the sliding distance is limited by the elliptical counterbore. The guide sleeve B22 and the 4 sides of the movable template The contact is closely matched with the hanging table connection. The guide sleeve B22 is provided with an annular groove. In the closed mold state, the sliding block 23 is in contact with the annular groove surface set on the guide sleeve B22. The first cylindrical step surface set on the guide sleeve A21 Sliding fit with the central through hole surface provided on the guide sleeve B22, push rod 20 and sliding block 23 surface contact wedge tight fit;

The sliding gap between the precision guide post 7 and the precision guide sleeve 8 is guaranteed to be 0.01 mm to 0.015 mm; the cooperation gap between the fixed pin 15 and the upper floating plate 5 and the lower floating plate 6 is guaranteed to be 0.005 mm to 0.01 mm; the guide sleeve The matching gap between A21 and the lower floating plate 6 is guaranteed to be 0.005 mm to 0.01 mm; the sliding gap between the push rod 20 and the guide sleeve A21 is guaranteed to be 0.01 mm to 0.015 mm; the sliding gap between the guide sleeve A21 and the guide sleeve B22 is guaranteed to be 0.015 mm ～0.03mm; the sliding gap between the sliding block 23 and the guide sleeve A21 is guaranteed to be 0.01mm～0.015mm; the sliding gap between the first inclined sliding rod 11 and the second inclined sliding rod 12 and the fixed mold insert 18 is guaranteed to be 0.01mm ~0.015mm.

The working principle of the precision-level inclined-sliding demoulding mechanism is as follows: during the mold opening process, the frictional locking force is generated between the push rod 20 and the sliding block 23 through the wedge fit between the two, and the wedge fit between the sliding block 23 and the guide sleeve B22 is used. The friction locking force is generated to drive the upper floating plate 5 and the lower floating plate 6 to move, the upper floating plate 5 and the lower floating plate 6 slide along the axis direction of the precision guide column 7, and at the same time the upper floating plate 5 and the lower floating plate 6 drive the first inclined The slide bar 11 and the second inclined slide bar 12 do oblique sliding motions to realize the smooth demoulding of the undercut part on the surface of the plastic product. When the lower floating plate 6 contacts the fixed template 3, the upper floating plate 5 and the lower floating plate 6 stop moving. At the same time, the lower floating plate 6 generates a thrust force on the fixed template 3, and under the joint action of the thrust force and the driving force of the molding machine, the friction locking force between the push rod 20 and the sliding block 23 and the frictional locking force between the sliding block 23 and the guide sleeve B22 are overcome. The frictional locking force, the push rod 20 is separated from the sliding block 23 and moves linearly along the central through hole of the guide sleeve A21, and the fixed template 3 and the movable template 4 are fully separated.

The beneficial effects of the present invention are: through the wedge-fitting of the push rod 20 and the sliding block 23 in the precision-level inclined-sliding demoulding mechanism to generate frictional locking force and the frictional locking force generated by the sliding block 23 and the guide sleeve B22, the frictional locking force is realized. The sliding of the upper floating plate 5 and the lower floating plate 6 during the mold opening process realizes the movement of the first inclined slide bar 11 and the second inclined slide bar 12 through the sliding of the floating plate 5 and the lower floating plate 6, thereby making the plastic product The undercut of the mold is demolded smoothly, and the cooperation of the precision guide post 7 and the precision guide sleeve 8 ensures the accuracy of the sliding track of the slanted part. The precision-level slanted demoulding mechanism simplifies the mold structure and reduces the mold cost and production cost. , Utilize the power generated by the mold opening to realize oblique sliding mold release, avoid the increase in cost of the peripheral drive mechanism, work stably, reduce the defect rate in mass production, make the product meet the technical requirements and use requirements, and improve production efficiency.

Description of drawings

Below in conjunction with accompanying drawing, with embodiment concrete description.

Fig. 1 is the overall schematic diagram 1 of this mould.

Fig. 2 is the overall schematic diagram 2 of the mold.

Fig. 3 is a cut-away schematic diagram 1 of a precision-grade inclined sliding demoulding mechanism.

Fig. 4 is a cut-away schematic diagram 2 of a precision-grade inclined sliding demoulding mechanism.

In the figure: 1 hot runner plate; 2 push plate; 3 fixed template; 4 movable template; 5 upper floating plate; 6 lower floating plate; 7 precision guide post; 8 precision guide sleeve; 9 upper fixed plate; 10 lower fixed plate; 11 first slanting slide bar; 12 second slanting slide bar; 13 small shaft; 14 roller; 15 fixed pin; 16 support column; 17 fixed mold insert; 18 fixed mold insert; 19 pressure plate; 20 push rod; Set A; 22 guide sleeve B; 23 sliding block; 24 limit pin; 25 positioning bolt.

Detailed ways

Specific embodiments of the invention will be described in detail below in conjunction with technical text and accompanying drawings.

When assembling the mould, the small shaft 13 is fitted in the shaft hole processed on the first inclined slide bar 11, and the two rollers 14 are respectively fitted on both sides of the first inclined slide bar 11, while the small shaft 13 is fitted on both sides of the first inclined slide bar 11. In the shaft hole processed on the first roller 14, the first slanting rod combination is assembled, the second slanting rod combination is installed the same as the first slanting rod combination, and the installed first slanting rod combination and the second slanting rod combination are installed. The slide bar combination is placed in the processed cavity of the lower floating plate 6, the roller 14 is matched with the counterbore of the hanging platform processed on the lower floating plate 6 (see Figure 3), and the sliding block 23 is fitted on the processed channel of the guide sleeve A21. In the hole, the limit pin 24 is fitted in the pin hole processed on the guide sleeve A21, and cooperates with the elliptical counterbore clearance provided on the sliding block 23, and the positioning bolt 25 is threadedly connected with the guide sleeve A21 to the limit pin 24. Limit (see Figure 4), the guide sleeve A21 is assembled in the hole of the processed guide sleeve of the lower floating plate 6, and the limit is connected by the hanging table, and the precision guide sleeve 8 is assembled in the hole of the processed guide sleeve of the upper floating plate 5. The limit of the table connection, the guide sleeve A21 is fitted in the processed guide sleeve hole of the lower floating plate 6, and the limit is connected by the hanging table, and the fixed pin 15 is fitted in the cavity processed on the upper floating plate 5 and the lower floating plate 6 , and the upper floating plate 5 and the lower floating plate 6 are positioned, the bolts pass through the upper floating plate 5 to lock and fix it with the lower floating plate 6, and the precision guide post 7 is fitted in the guide post hole processed by the fixed template 3. Hanging table connection limit (see Figure 1, 2), fixed mold insert 18 fits in the cavity processed by fixed mold insert 17, and is limited by hanging table connection, fixed mold insert 17 is fitted on fixed template 3 In the processed mold cavity, bolts pass through the fixed template 3 to lock and fix the fixed mold insert 17 with it, and the upper floating plate 5 and the lower floating plate 6 are assembled into the upper mold cavity processed by the fixed template 3 as a whole, and the The guide post 7 is fitted in the guide post hole of the precision guide sleeve 8, and the support post 16 is fitted on the upper floating plate 5 and the lower floating plate 6. Lock and fix, the push rod 20 is fitted in the processed cavity of the push plate 2 and is limited by the hanging table, the pressure plate 19 is fitted in the processed cavity of the push plate 2, and the bolt passes through the pressure plate 19 to connect it with the push plate 2 is locked and fixed, the push plate 2 is assembled with the fixed template 3, the push rod 20 is matched with the guide sleeve A21, the bolt passes through the push plate 2 to lock and fix it with the fixed template 3 (see Figure 1, 2), and the guide sleeve B22 is matched Installed in the molded cavity of the movable template 4 and connected by the hanging table to limit the position, the guide sleeve A21 is assembled with the guide sleeve B22, the push rod 20 is wedge-tightly assembled with the sliding block 23, and the sliding block 23 is wedge-tightly assembled with the guide sleeve B22 ( See Figure 4).

The implementation and operation process of the precision-level inclined-sliding demoulding mechanism is as follows: after the injection of the molding machine is completed, the fixed template 3 and the movable template 4 are separated under the action of the molding machine. The sleeve B22 is wedge-tightly matched with the driving guide sleeve A21 to drive the upper floating plate 5 and the lower floating plate 6 to move, and the upper floating plate 5 and the lower floating plate 6 drive the first inclined sliding rod 11 and the second inclined sliding rod 12 to slide away from the surface of the product. In the undercut part, when the lower floating plate 6 touches the fixed template 3, the push rod 20 is separated from the sliding block 23, so that the push rod 20 and the guide sleeve A21 are separated from the guide sleeve B22, and finally the fixed template 3 and the movable template 4 are completely separated, and the precision-grade oblique The sliding ejection mechanism realizes the ejection of plastic products with precision fitting ports or small-area undercuts. The precision-level inclined sliding ejection mechanism has precise positioning and ingenious structure, which breaks through the traditional fixed-mold slider mechanism and simplifies the mold mechanism. Thereby reducing the mold and production costs, saving labor and materials and shortening the mold manufacturing cycle. The precision-level oblique sliding mold release mechanism has been successfully applied to the molding molds of precision plastic products in the fields of automobiles, electronics, and medical equipment. Production The process is stable, safe and reliable.

The above is a superior embodiment of the present invention, it should be pointed out that for those skilled in the art of the present invention, without departing from the technical principle of the present invention, some improvements and deformations can also be made, these improvements and deformations It should also be regarded as the protection scope of the present invention.

Claims (1)

1. The precision grade oblique slipping die mechanism is characterized by comprising the following components in part by weight: the hot runner plate (1), the push plate (2), the fixed template (3), the movable template (4), the upper floating plate (5), the lower floating plate (6), the precise guide post (7), the precise guide sleeve (8), the upper fixed plate (9), the lower fixed plate (10), the first inclined slide rod (11), the second inclined slide rod (12), the small shaft (13), the roller (14), the fixed pin (15), the support column (16), the fixed die insert (17), the fixed die insert (18), the pressing plate (19), the push rod (20), the guide sleeve A (21), the guide sleeve B (22), the sliding block (23), the limit pin (24) and the positioning bolt (25); the connection relation is as follows: the upper floating plate (5) and the lower floating plate (6) are tightly locked and fixed by bolts in surface contact, the fixed pin (15) is tightly matched with pin hole surfaces arranged on the upper floating plate (5) and the lower floating plate (6), the upper floating plate (5) and the lower floating plate (6) are tightly matched with an upper cavity clearance matched on the fixed die plate (3), the precise guide sleeve (8) is tightly matched with a hanging table in surface contact, the precise guide sleeve (8) is tightly matched with the lower floating plate (6) in surface contact, the precise guide post (7) is in surface contact sliding fit with the precise guide sleeve (8), the precise guide post (7) is tightly matched with the fixed die plate (3) in surface contact by bolts in interference fit, the upper floating plate (5) is tightly matched with the upper fixed die plate (9) in surface contact, the precise oblique sliding die mechanism comprises two oblique sliding rod combinations, a first oblique sliding wheel (14) and a first oblique sliding rod (11), the second oblique sliding rod (14) is tightly matched with a second oblique sliding rod (14) in shape, the two oblique sliding rod (14) are tightly matched with the two oblique sliding rod (14) in the center of the two oblique sliding rod (11) in surface contact, the small shaft (13) is in contact tight fit with the shaft hole surfaces arranged on the two rollers (14), and the small shaft (13) is in contact tight fit with the shaft hole surfaces arranged on the first inclined slide bar (11); the second inclined slide bar combination connection relationship is the same as the first inclined slide bar connection relationship; a hanging table counter bore and a through cavity are formed in the lower floating plate (6), the first inclined slide rod (11) and the second inclined slide rod (12) are in clearance fit with the through cavity formed in the lower floating plate (6), and the idler wheels (14) are in contact sliding fit with the hanging table counter bore surface formed in the lower floating plate (6); the first inclined slide bar (11) and the second inclined slide bar (12) are in surface contact sliding fit with the fixed die insert (18), the upper surface of the pressing plate (19) is in surface contact with the hot runner plate (1) to limit the hot runner plate, the pressing plate (19) and the pushing plate (2) are locked and fixed through bolts in clearance fit, the upper top surface of the pushing rod (20) is in surface contact with the pressing plate (19) and limits the pressing plate, the pushing rod (20) is connected with a hanging table in surface contact close fit with the pushing plate (2), the pushing rod (20) is in surface contact sliding fit with the guide sleeve A (21), a through hole is arranged in the center of the guide sleeve A (21), a guide sleeve A (21) body is composed of the hanging table and two layers of cylindrical steps, a square through hole is arranged on the first layer of cylindrical step, the square through hole is axially perpendicular to the guide sleeve A (21), the square through hole is divided into two parts by the through holes arranged on the guide sleeve A (21), the bottom surface of the divided square through hole is respectively provided with a pin hole, the pin hole is in surface contact close fit with a limit pin (24), the bottom of the pin hole is provided with a screw hole, the positioning bolt (25) is in surface contact close fit with the guide sleeve A (2), the positioning bolt (25) is connected with the guide sleeve A (21) in surface contact with the upper surface of the guide sleeve A (24), the upper surface of the guide sleeve A (3) in contact with the limit pin (5), the guide sleeve A (21) is connected with the surface contact close fit hanging table of the lower floating plate (6); two sliding blocks (23) are arranged in the precision grade oblique sliding die mechanism, six faces are arranged on the sliding blocks (23), two faces perpendicular to the moving direction of the six faces are cylindrical faces, the other faces of the six faces are planes, the diameter of the cylindrical face positioned on the inner side of the cylindrical face is the same as the diameter of the push rod (20), chamfer angles are arranged on each edge angle of the sliding blocks (23), the sliding blocks (23) are in contact sliding fit with square through hole faces arranged on the guide sleeve A (21), oval counter bores are arranged on the sliding blocks (23), limiting pins (24) are in clearance fit with the oval counter bores arranged on the sliding blocks (23) in the die closing state, the sliding blocks (23) slide in the die opening process, the sliding distance is limited by the oval counter bores, the guide sleeve B (22) is in contact tight fit with the surface of the moving die plate (4), an annular groove is arranged on the guide sleeve B (22), the sliding blocks (23) are in contact with the annular groove faces arranged on the guide sleeve B (22), the first layer of the cylindrical step faces arranged on the guide sleeve A (21) are in contact with the center faces (22) of the guide sleeve B (20) in a tight fit manner, and the sliding faces are in contact with the center faces (20) of the guide sleeve B (22) in the die closing state; the sliding gap between the precise guide post (7) and the precise guide sleeve (8) is ensured to be 0.01-0.015 mm; the fit clearance between the fixed pin (15) and the upper floating plate (5) and the lower floating plate (6) is ensured to be 0.005-0.01 mm; the fit clearance between the guide sleeve A (21) and the lower floating plate (6) is ensured to be 0.005-0.01 mm; the sliding clearance between the push rod (20) and the guide sleeve A (21) is ensured to be 0.01-0.015 mm; the sliding gap between the guide sleeve A (21) and the guide sleeve B (22) is ensured to be 0.015-0.03 mm; the sliding gap between the sliding block (23) and the guide sleeve A (21) is ensured to be 0.01-0.015 mm; the sliding clearance between the first inclined sliding rod (11) and the sliding clearance between the second inclined sliding rod (12) and the fixed die insert (18) are ensured to be 0.01-0.015 mm.