CN215095250U

CN215095250U - Injection mold for bicycle body shield convenient for demolding

Info

Publication number: CN215095250U
Application number: CN202120735293.3U
Authority: CN
Inventors: 李海军
Original assignee: Tianjin Wande Auto Parts Co ltd
Current assignee: Tianjin Wande Auto Parts Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-12-10
Anticipated expiration: 2031-04-12

Abstract

The utility model provides an injection mold for bicycle body guard shield convenient for demolding, which comprises a male mold, a female mold, a fixing plate, a guide pillar, a cushion block and a rotary ejection mechanism, wherein the guide pillar is arranged between the female mold and the fixing plate, the cushion block is fixed on the right side of the fixing plate, slide holes are transversely arranged at the upper end and the lower end of the male mold, the male mold is arranged on the guide pillar through the slide holes in a sliding way, the rotary ejection mechanism is symmetrically arranged at the upper part and the lower part on the left side of the male mold, when the male mold moves leftwards and is demolded, a straight gear rotates under the action of a rack and drives a bevel gear A and a bevel gear B to rotate, a rotary torsion shaft drives an ejector rod to rotate through a spline groove and a spline, a top plate at the left end of the ejector rod is pressed against a backing plate, the ejector rod is extruded to slide rightwards and rotate to eject an injection molding piece, and the ejector rod also performs rotary operation while moving rightwards, so that a flat push plate of the ejector rod rotates and breaks away when ejecting the injection molding piece, the situation that the injection molding piece cannot fall off after the ejector rod is ejected out can not occur, and the production efficiency is increased.

Description

Injection mold for bicycle body shield convenient for demolding

Technical Field

The utility model relates to an injection mold field especially relates to a make things convenient for injection mold for bicycle automobile body guard shield of drawing of patterns.

Background

The bicycle body guard shield is an injection molding part for protecting a bicycle body, the demoulding of the existing bicycle body guard shield is generally ejected by an ejector rod, but the bicycle body guard shield is a thin injection molding part with a large area, the front end of the ejector rod used for production must have a large contact area with the injection molding part due to stress, the damage of the injection molding part caused by the undersize contact area of the ejector rod and the injection molding part is mainly prevented, but a new problem is caused by the overlarge contact area of the ejector rod and the injection molding part, the contact area of the injection molding part is large in fixed intervention during demoulding of the injection molding part, so that the injection molding part and the ejector rod are easily stuck to a large degree, a lot of injection molding parts cannot directly fall off after being ejected by the ejector rod, and the production process is delayed.

Disclosure of Invention

According to the technical problem, the utility model provides a convenient injection mold for bicycle automobile body guard shield of drawing of patterns which comprises a terrace die, a fixed plate, guide pillars, a cushion block and a rotary ejection mechanism, be provided with the guide pillars between die and the fixed plate, the guide pillars are two and are arranged symmetrically from top to bottom, the cushion block is fixed on the right side of the fixed plate through the bolt, screw rod via holes are both opened in the center of the fixed plate and the cushion block, slide holes are transversely opened at the upper and lower ends of the terrace die, the terrace die is slidably mounted on the guide pillars through the slide holes, the rotary ejection mechanism is symmetrically arranged from top to bottom on the left side of the terrace die, a cavity is opened on the left end face of the die, and a die core is arranged on the right end face of the terrace die;

the rotary ejection mechanism comprises an installation block, a rack, a straight gear, a transmission shaft, a bevel gear A, a bevel gear B, a rotary torsion shaft, an ejector rod and a reset spring, the installation block is arranged on the left side of the punch, the installation block and the punch are of an integral structure, the rack is arranged at one end of the outer side of the installation block, the left end of the rack is connected with a fixed plate, the transmission shaft is vertically arranged in the installation block, the straight gear is arranged at one end, close to the rack, of the transmission shaft, the bevel gear A is arranged at one end, far away from the rack, of the transmission shaft, the straight gear is meshed with the rack, the right end of the rotary torsion shaft is rotatably arranged in the punch through a bearing, the bevel gear B is arranged at the left end of the rotary torsion shaft, the bevel gear B is meshed with the bevel gear A, a spline groove is transversely formed in the centers of the bevel gear B and the rotary torsion shaft, the spline groove is a through groove, the outer side of the left half part of the ejector rod is provided with a spline, the ejector rod is slidably mounted in a spline groove of the rotary torsion shaft through the spline, the left side of the ejector rod extends out of the outer side of the bevel gear B and is provided with a top plate, the outer side of the ejector rod, which is positioned on the outer side of the bevel gear B, is sleeved with a reset spring, one end of the reset spring abuts against the top plate, the other end of the reset spring abuts against the bevel gear B, and the right end of the ejector rod extends to the right end face of the male die and is provided with a flat push plate.

The utility model has the advantages that:

the utility model discloses a be provided with rotatory ejection mechanism, when the terrace die moved the drawing of patterns left, the terrace die drove the installation piece left simultaneously and moved, the installation piece drove transmission shaft and straight-teeth gear left motion, because straight-teeth gear and rack interlock and rack position are fixed, so the straight-teeth gear takes place rotatoryly in the process of moving left, the straight-teeth gear drove bevel gear A through the transmission shaft and rotates, bevel gear A drove bevel gear B and rotatory torsion shaft and rotates, rotatory torsion shaft drove the ejector pin through spline groove and spline and rotates, when the terrace die continued moving left simultaneously, the roof of ejector pin left end pushes up on the backing plate, the ejector pin receives the extrusion and slides to the right in the spline groove, the ejector pin rotates under the effect of spline when sliding to the right, the flat push pedal of ejector pin right-hand member moves right and rotates and ejects the injection molding, this kind of structure passes through gear drive, the cooperation of spline and spline groove, the ejector rod moves rightwards and rotates, so that the injection molding part is rotated and separated when being ejected by the flat push plate of the ejector rod, the situation that the injection molding part cannot fall off after the ejector rod is ejected is avoided, and the production efficiency is improved.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a side view of a bevel gear B of the present invention;

FIG. 4 is a cross-sectional view of the rotary torque shaft of the present invention;

fig. 5 is a cross-sectional view a-a of fig. 4.

As shown in the figure: 1. a male die; 2. a female die; 3. a fixing plate; 4. a guide post; 5. cushion blocks; 6. a cavity; 7. a mold core; 8. mounting blocks; 9. a rack; 10. a spur gear; 11. a drive shaft; 12. a bevel gear A; 13. a bevel gear B; 14. a rotating torsional shaft; 15. a top rod; 16. a return spring; 17. a spline groove; 18. a spline; 19. a top plate; 20. a flat push plate; 21. the screw is pushed.

Detailed Description

Example 1

The utility model provides a make things convenient for injection mold for bicycle automobile body guard shield of drawing of patterns, its characterized in that includes terrace die 1, die 2, fixed plate 3, guide pillar 4, cushion 5 and rotatory ejection mechanism, be provided with guide pillar 4 between die 2 and fixed plate 3, guide pillar 4 is two and the symmetry sets up from top to bottom, fixed plate 3 right side is fixed with cushion 5 through the bolt, fixed plate 3 and cushion 5 central authorities have all seted up the screw rod via hole, terrace die 1 upper and lower both ends have transversely seted up the slide opening, terrace die 1 is slidably mounted on guide pillar 4 through the slide opening, terrace die 1 left side symmetry is provided with rotatory ejection mechanism from top to bottom, die 2 left end face has seted up die cavity 6, terrace die 1 right end face is provided with mould benevolence 7;

the rotary ejection mechanism comprises a mounting block 8, a rack 9, a straight gear 10, a transmission shaft 11, a bevel gear A12, a bevel gear B13, a rotary torsion shaft 14, a mandril 15 and a return spring 16, wherein the mounting block 8 is arranged on the left side of a male die 1, the mounting block 8 and the male die 1 are of an integral structure, the rack 9 is arranged at one end of the outer side of the mounting block 8, the left end of the rack 9 is connected with a fixing plate 3, the transmission shaft 11 is vertically arranged in the mounting block 8, the straight gear 10 is arranged at one end of the transmission shaft 11 close to the rack 9, the bevel gear A12 is arranged at one end of the transmission shaft 11 far away from the rack 9, the straight gear 10 is meshed with the rack 9, the right end of the rotary torsion shaft 14 is rotatably arranged in the male die 1 through a bearing, the bevel gear B13 is arranged at the left end of the rotary torsion shaft 14, the bevel gear B13 is meshed with the bevel gear A12, a spline groove 17 is transversely arranged at the centers of the bevel gear B13 and the rotary torsion shaft 14, the spline groove 17 is a through groove, the outer side of the left half part of the ejector rod 15 is provided with a spline 18, the ejector rod 15 is slidably mounted in a spline groove 17 of the rotary torsion shaft 14 through the spline 18, the left side of the ejector rod 15 extends out of the bevel gear B13 and is provided with a top plate 19, the outer side of the ejector rod 15 positioned on the outer side part of the bevel gear B13 is sleeved with a return spring 16, one end of the return spring 16 abuts against the top plate 19, the other end of the return spring 16 abuts against the bevel gear B13, and the right end of the ejector rod 15 extends to the right end face of the male die 1 and is provided with a flat push plate 20.

Example 2

When the utility model is used, the fixed plate 3 and the female die 2 are respectively fixed on the frame of the injection molding machine, and the pushing screw 21 of the injection molding machine passes through the screw through holes of the fixed plate 3 and the cushion block 5 and is connected with the left end of the male die 1, after the injection molding is finished, the injection molding part is formed in the cavity 6, the pushing screw 21 drives the male die 1 to move leftwards, the male die 1 simultaneously drives the installation block 8 to move leftwards, the installation block 8 drives the transmission shaft 11 and the straight gear 10 to move leftwards, because the straight gear 10 is meshed with the rack 9 and the position of the rack 9 is fixed, the straight gear 10 rotates in the process of moving leftwards, the straight gear 10 drives the bevel gear A12 to rotate through the transmission shaft 11, the bevel gear A12 drives the bevel gear B13 and the rotary torsion shaft 14 to rotate, the rotary torsion shaft 14 drives the ejector rod 15 to rotate through the spline groove 17 and the spline 18, and when the male die 1 continues to move leftwards, the top plate 19 at the left end of the ejector rod 15 is pressed against the cushion plate, the ejector rod 15 is extruded to slide rightwards in the spline groove 17, the ejector rod 15 slides rightwards and rotates under the action of the spline 18, the flat push plate 20 at the right end of the ejector rod 15 moves rightwards and rotates to eject an injection molding piece, the injection molding piece is prevented from being adhered to the flat push plate 20 of the ejector rod 15, then the die is assembled, the push screw 21 drives the male die 1 to move rightwards, the ejector rod 15 moves leftwards under the action of the reset spring 16 to enable the flat push plate 20 at the right end of the ejector rod 15 to reset, and the next injection molding operation is continued.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An injection mold for a bicycle body shield convenient for demolding is characterized by comprising a male mold, a female mold, a fixing plate, a guide pillar, a cushion block and a rotary ejection mechanism, wherein the guide pillar is arranged between the female mold and the fixing plate, the cushion block is fixed on the right side of the fixing plate through a bolt, slide holes are transversely formed in the upper end and the lower end of the male mold, the male mold is slidably mounted on the guide pillar through the slide holes, the rotary ejection mechanism is symmetrically arranged on the left side of the male mold from top to bottom, a cavity is formed in the left end face of the female mold, and a mold core is arranged on the right end face of the male mold;

the rotary ejection mechanism comprises an installation block, a rack, a straight gear, a transmission shaft, a bevel gear A, a bevel gear B, a rotary torsion shaft, an ejector rod and a reset spring, the installation block is arranged on the left side of a male die, the rack is arranged at one end of the outer side of the installation block, the left end of the rack is connected with a fixed plate, the transmission shaft is vertically arranged in the installation block, the straight gear is arranged at one end of the transmission shaft close to the rack, the bevel gear A is arranged at one end of the transmission shaft far away from the rack, the straight gear is meshed with the rack, the right end of the rotary torsion shaft is rotatably arranged in the male die through a bearing, the bevel gear B is arranged at the left end of the rotary torsion shaft, the bevel gear B is meshed with the bevel gear A, spline grooves are transversely formed in the centers of the bevel gear B and the rotary torsion shaft, the spline grooves are through grooves, and splines are arranged on the outer side of the left half part of the ejector rod, the push rod is slidably mounted in a spline groove of the rotary torsion shaft through a spline, the left side of the push rod extends out of the outer side of the bevel gear B and is provided with a top plate, a reset spring is sleeved on the outer side of the push rod positioned on the outer side of the bevel gear B, one end of the reset spring abuts against the top plate, the other end of the reset spring abuts against the bevel gear B, and the right end of the push rod extends to the right end face of the male die and is provided with a flat push plate.

2. The injection mold for a bicycle body cover capable of being conveniently demolded as claimed in claim 1, wherein the guide posts are two and are disposed up and down symmetrically.

3. The injection mold for the bicycle body shroud as claimed in claim 1, wherein the fixing plate and the cushion block are both provided with screw through holes at the center.

4. The injection mold for a bicycle body cover capable of being conveniently demolded as claimed in claim 1, wherein the mounting block is integrally formed with the male mold.