Ejection structure for pulling deformation, forced demolding and oblique part taking

Abstract

The utility model relates to an ejection structure for pulling deformation, forced demolding and oblique piece taking. A rear mold core is fixedly arranged on a rear mold plate of a mold, a channel is formed in the rear mold core, a straight ejection block and a straight ejection rod are arranged in the channel, the straight ejection block is located at the top of the straight ejection rod and connected with the straight ejection rod, and the bottom of the straight ejection rod is fixed to an ejector plate. A long-strip-shaped component which is defined by a left wall face, an upper wall face and a right wall face and is provided with a downward opening is adopted for the product, the inner side of the left wall face and the inner side of the right wall face of the product are each provided with a protruding long-strip-shaped inverted buckle, a long groove is formed in the contact position of a straight ejector block and a rear mold core, and the long-strip-shaped inverted buckle on the inner side of the right wall face is correspondingly formed during injection molding. A pulling deformation sliding block is arranged on the left side of a protruding part on the top of the rear mold core, a long groove is formed in the contact position of the rear mold core and the pulling deformation sliding block, and a long-strip-shaped inverted buckle on the inner side of the left wall face is correspondingly formed in the injection molding process. The utility model has the advantages of better structural strength and relatively lower risk of top block printing, and ensures the appearance quality and qualified rate of products.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially a pull deformation strong ejection structure of skew direction taking out. BACKGROUND

[0002] Nowadays, the automobile industry develops rapidly, and more and more plastic parts are used on the automobile, and the structure of the parts is more and more complex. With the improvement of people's living standards, the requirements for automobiles are more stringent, not only the performance is superior, but also the appearance is exquisite. Therefore, the requirements for automobile injection mold are more stringent, especially the assembly state of the outer appearance parts is more stringent.

[0003] In the prior art, for the long strip appearance part, because the width direction size of the product is relatively narrow, the inside structure of the product has a small mold space, which leads to a relatively weak mold structure strength, and there is a risk of structural deformation and product top block printing. UTILITY MODEL CONTENT

[0004] The applicant provides a pull deformation strong ejection structure of skew direction taking out with a reasonable structure to effectively solve the above problems, aiming at the problems of the long strip appearance part in the prior art, such as the narrow width direction size of the product, the small inside structure of the product, the relatively weak mold structure strength, and the structural deformation and product top block printing.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A pull deformation strong ejection structure of skew direction taking out is fixedly arranged on the back mold plate of the mold, a back mold core is arranged in the back mold plate, a channel is formed in the back mold core, a straight top block and a straight top rod are arranged in the channel, the straight top block is located at the top of the straight top rod and connected with the straight top rod, the bottom of the straight top rod is fixed on a ejector pin plate, the straight top block extends out of the back mold core, a product is located in a cavity formed on one side of the back mold core, the product is in contact with the straight top block in the cavity, the product is a long strip part with a downward opening formed by a left wall surface, an upper wall surface and a right wall surface, the left wall surface and the right wall surface of the product are provided with protruding long strip undercuts, the contact position of the straight top block and the back mold core forms a long groove, the long strip undercut corresponding to the right wall surface is formed during injection, a pull deformation sliding block is arranged on the left side of the protruding part at the top of the back mold core, and the contact position of the back mold core and the pull deformation sliding block forms a long groove, the long strip undercut corresponding to the left wall surface is formed during injection.

[0007] As a further improvement of the above technical scheme:

[0008] The left side of the straight top block and the protruding part at the top of the back mold core are matched to form a cooperation, and the pull deformation sliding block and the left side of the protruding part of the back mold core form a cooperation.

[0009] The stretch-forming slider comprises a body and a protruding tongue, which is in a movable plug-in fit with a groove on the left side of the convex part of the back die core.

[0010] The end of the protruding tongue of the stretch-forming slider is formed with an upturned hook, when the tongue is in fit with the groove of the convex part of the back die core, a long groove is formed between the back die core and the hook of the stretch-forming slider, which corresponds to form a long inverted buckle on the inner side of the left wall surface during injection molding.

[0011] When the product is injection molded, the hook is in contact with the inner side surface of the left wall surface of the product.

[0012] The body of the stretch-forming slider is internally provided with an upwardly inclined through hole, the stretch-forming slider is in a movable plug-in fit with the inclined guide post, and the top of the inclined guide post is fixedly installed on the inclined guide post pressing block.

[0013] The body of the stretch-forming slider is provided with a stretch-forming slider wear-resistant sheet, the stretch-forming slider wear-resistant sheet is fixedly installed on the back die plate, and the stretch-forming slider slides on the stretch-forming slider wear-resistant sheet.

[0014] The stretch-forming slider is provided with a stretch-forming slider limiting block on the left side, the stretch-forming slider limiting block is fixedly installed on the back die plate, and the stretch-forming slider limiting block limits the sliding of the stretch-forming slider.

[0015] The stretch-forming slider is provided with stretch-forming slider pressing strips at two side positions, the stretch-forming slider pressing strips are fixedly installed on the back die plate and limit the outer edge of the side of the stretch-forming slider, and the stretch-forming slider pressing strips on the two sides guide when the stretch-forming slider slides.

[0016] The channel of the back die core is divided into an upper channel and a lower channel, the upper channel and the lower channel are provided with a necked limiting hole therebetween, a top rod guide sleeve is arranged in the lower channel below the limiting hole section, a straight top rod is inserted into the top rod guide sleeve and moves in the top rod guide sleeve, and a straight top block is located above the limiting hole section and is fixedly connected with the top of the straight top rod.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a forming mechanism developed based on the characteristics that plastic products have certain plastic deformation, which can not only simplify the structure, but also has relatively good structural strength, avoids the deformation or cracking risk caused by insufficient structural strength, and guarantees the service life of the mold. Moreover, the product ejection structure of the utility model is relatively stable, the top block printing risk is relatively small, and the appearance quality of the product and the qualified rate of injection molding production are guaranteed. DRAWINGS

[0019] Figure 1 The utility model discloses a forming mechanism developed based on the characteristics that plastic products have certain plastic deformation, which can not only simplify the structure, but also has relatively good structural strength, avoids the deformation or cracking risk caused by insufficient structural strength, and guarantees the service life of the mold. Moreover, the product ejection structure of the utility model is relatively stable, the top block printing risk is relatively small, and the appearance quality of the product and the qualified rate of injection molding production are guaranteed.

[0020] Figure 2 It is the schematic view of step one when the utility model works.

[0021] Figure 3 It is the schematic view of step two when the utility model works.

[0022] Figure 4 It is the schematic view of step three when the utility model works.

[0023] Figure 5 It is the schematic view of the product of the utility model.

[0024] Marked as in the drawing: 1, product;2, draw deformation slider;3, slider inclined guide pillar;4, inclined guide pillar pressing block;5, slider wear plate;6, slider limit block;7, straight top block;8, rear mold core;9, straight top rod;10, top rod guide sleeve. Specific implementation

[0025] The preferred embodiments of the utility model will be described in detail below with reference to the accompanying drawings.

[0026] Referring to Figures 1 to 5 The utility model discloses a draw deformation strong drawout oblique direction takes out structure, is fixedly arranged with rear mold core 8 on the rear mold plate of mould, is set up with straight top block 7 and straight top rod 9 in the passageway of rear mold core 8, straight top block 7 is located at the top of straight top rod 9 and is connected with straight top rod 9, and the bottom of straight top rod 9 is fixed on the thimble plate, and straight top rod 9 is driven by the thimble plate and moves in the passageway of rear mold core 8 in straight line. Straight top block 7 extends outside rear mold core 8, and product 1 is located in the cavity formed on the side of rear mold core 8, product 1 is injection molded in the cavity, and product 1 is in contact with straight top block 7 in the cavity.

[0027] Product 1 is a plastic part produced by injection mold, adopts the downwardly open long strip type component formed by left wall surface, upper wall surface and right wall surface, and the left wall surface inboard and right wall surface inboard of product 1 all have protruding long strip undercut, and the long strip undercut protrudes from the inboard surface of product 1. The top of straight top block 7 has the structure of forming the long strip undercut of the right wall surface inboard of product 1, to form the long strip undercut of the right wall surface inboard, the contact position of straight top block 7 and rear mold core 8 forms long groove, and the long strip undercut of the right wall surface inboard is formed correspondingly during injection.

[0028] The left side of straight top block 7 and the protruding part of the top of rear mold core 8 are mutually pasted and form cooperation, draw deformation slider 2 is arranged on the left side of the protruding part of rear mold core 8, draw deformation slider 2 and the left side surface of the protruding part of rear mold core 8 form cooperation, and the left side of the protruding part of rear mold core 8 has the structure of forming the long strip undercut of the left wall surface inboard of product 1, to form the long strip undercut of the left wall surface inboard of product 1, the contact position of rear mold core 8 and draw deformation slider 2 forms long groove, and the long strip undercut of the left wall surface inboard is formed correspondingly during injection.

[0029] The pull deformation slider 2 comprises a body and an extended tongue, which is in movable plug-in fit with the groove on the left side of the convex part of the back mold core 8. The end of the extended tongue of the pull deformation slider 2 is formed with an upturned hook, and when the tongue and the groove of the convex part of the back mold core 8 are in mutual fit, a long groove is formed between the hook of the pull deformation slider 2 and the back mold core 8, which corresponds to the formation of the long inverted buckle on the inner side of the left wall surface during injection molding, and the hook is in contact with the inner side surface of the left wall surface of the product 1 after the product 1 is injection molded.

[0030] The body of the pull deformation slider 2 is internally provided with an upwardly inclined through hole, and the slider inclined guide column 3 is inclinedly located in the through hole of the pull deformation slider 2 and is in movable plug-in fit with the pull deformation slider 2. The top of the slider inclined guide column 3 is fixedly installed on the inclined guide column pressing block 4, and the bottom of the slider inclined guide column 3 is inserted into the through hole of the pull deformation slider 2. The bottom of the body of the pull deformation slider 2 is provided with a slider wear-resistant sheet 5, which is fixedly installed on the back mold plate. The pull deformation slider 2 is driven by the slider inclined guide column 3 to slide on the slider wear-resistant sheet 5, so that the tongue of the pull deformation slider 2 moves relative to the groove of the back mold core 8.

[0031] The slider limiting block 6 is arranged on the left side of the pull deformation slider 2 and is fixedly installed on the back mold plate. The slider limiting block 6 limits the sliding of the pull deformation slider 2. Slider pressing strips are arranged at both side edges of the pull deformation slider 2 and are fixedly installed on the back mold plate. The slider pressing strips limit the outer edge of the side edge of the pull deformation slider 2 and guide the sliding of the pull deformation slider 2.

[0032] The channel of the back mold core 8 is divided into an upper channel and a lower channel, and the upper channel and the lower channel are connected through a necked limiting hole. A top rod guide sleeve 10 is arranged in the lower channel below the limiting hole section, and a straight top rod 9 is inserted into the top rod guide sleeve 10 and moves in the top rod guide sleeve 10. A straight top block 7 is located above the limiting hole section and is fixedly connected with the top of the straight top rod 9. When the ejector plate drives the straight top rod 9 to move upwardly and outwardly, the straight top block 7 is driven by the straight top rod 9 to move upwardly and outwardly.

[0033] The working process of the utility model is as follows:

[0034] As shown in Figure 2 When the injection is completed, the slider inclined guide column 3 drives the pull deformation slider 2 to slide backward, the inverted buckle structure on the left side of the product 1 is pulled open from the core buckle position through the backward sliding of the pull deformation slider 2, the pull deformation slider 2 pulls open the product 1, and the left side of the product 1 is outwardly pulled and plastically deformed. At this time, the product 1 has slight plastic deformation.

[0035] As shown in Figure 3As shown, then product 1 is ejected from the core side by straight top block 7, while being separated from the tensile deformation slider 2, at this time product 1 will plastic spring back, restore the free state.

[0036] As shown, after product 1 is ejected, the right side buckle is still buckled on the straight top block 7, the mechanical hand grabs product 1 and moves obliquely for a distance to separate the buckle on the straight top block 7, then retreats as a whole to complete the product 1 taking. Figure 4

[0037] The utility model discloses a forming mechanism based on the characteristics of the certain plasticity deformation of plastic product, thus not only can simplify the structure, and the structure strength is relatively better, avoids the risk of deformation or cracking due to the insufficient structure strength, guarantees the service life of mould.

[0038] Finally, it is pointed out that the above preferred embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail through the above preferred embodiments, but those skilled in the art should understand that various changes can be made in form and details without departing from the range defined by the utility model claim book.​

Claims

1. A structure for ejection of a draw-textured strong decatized product, characterized in that: The rear die core (8) is fixedly arranged on the rear mold plate of the mold, a channel is formed in the rear die core (8), a straight ejector block (7) and a straight ejector rod (9) are arranged in the channel, the straight ejector block (7) is located at the top of the straight ejector rod (9) and connected with the straight ejector rod (9), the bottom of the straight ejector rod (9) is fixed on the ejector pin plate, the straight ejector block (7) extends out of the rear die core (8), the product (1) is located in a cavity formed on one side of the rear die core (8), the product (1) is in contact with the straight ejector block (7) in the cavity, the product (1) is a downwardly open long strip-shaped component formed by a left wall surface, an upper wall surface and a right wall surface, the left wall surface and the right wall surface of the product (1) are provided with protruding long strip-shaped undercuts, the contact position of the straight ejector block (7) and the rear die core (8) forms a long groove, and the long strip-shaped undercut on the left wall surface is correspondingly formed during injection molding, and a protruding portion on the top of the rear die core (8) is provided with a tensile deformation sliding block (2), the contact position of the rear die core (8) and the tensile deformation sliding block (2) forms a long groove, and the long strip-shaped undercut on the left wall surface is correspondingly formed during injection molding.

2. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: The left side of the straight ejector block (7) and the protruding portion on the top of the rear die core (8) are matched to form a cooperation, and the tensile deformation sliding block (2) and the left side surface of the protruding portion of the rear die core (8) form a cooperation.

3. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: The tensile deformation sliding block (2) comprises a body and an extended tongue portion, and the tongue portion is movably inserted into a groove on the left side surface of the protruding portion of the rear die core (8).

4. The ejection structure of the draw-texturing strong decambering take-off according to claim 3, characterized in that: An upward hook portion is formed on the end of the extended tongue portion of the tensile deformation sliding block (2), when the tongue portion and the groove of the protruding portion of the rear die core (8) are matched with each other, a long groove is formed between the hook portion of the tensile deformation sliding block (2) and the rear die core (8), and the long strip-shaped undercut on the left wall surface is correspondingly formed during injection molding.

5. The ejection structure of the draw-texturing strong decambering take-off according to claim 4, characterized in that: When the product (1) is injection molded, the hook portion is in contact with the inner surface of the left wall surface of the product (1).

6. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: An upwardly inclined through hole is formed in the body of the tensile deformation sliding block (2), a sliding block inclined guide column (3) is inclinedly located in the through hole of the tensile deformation sliding block (2) and movably inserted into the tensile deformation sliding block (2), and the top of the sliding block inclined guide column (3) is fixedly installed on an inclined guide column pressing block (4).

7. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: A sliding block wear-resistant sheet (5) is arranged on the bottom of the body of the tensile deformation sliding block (2), the sliding block wear-resistant sheet (5) is fixedly installed on the rear mold plate, and the tensile deformation sliding block (2) slides on the sliding block wear-resistant sheet (5).

8. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: A sliding block limiting block (6) is arranged on the left side of the tensile deformation sliding block (2), the sliding block limiting block (6) is fixedly installed on the rear mold plate, and the sliding block limiting block (6) limits the sliding of the tensile deformation sliding block (2).

9. The ejection structure of the draw- texturing and strong decambering take-off according to claim 1, characterized in that: Sliding block pressing strips are arranged at two side edge positions of the tensile deformation sliding block (2), the sliding block pressing strips are fixedly installed on the rear mold plate and limit the outer edge portions of the side edges of the tensile deformation sliding block (2), and the sliding block pressing strips on both sides guide the tensile deformation sliding block (2) when the tensile deformation sliding block (2) slides.

10. The ejection structure of the draw-texturing strong decambering take-off according to claim 1, characterized in that: The passage of the back die core (8) is divided into an upper passage and a lower passage, and a necked limiting hole is arranged between the upper passage and the lower passage, a top rod guide sleeve (10) is arranged in the lower passage below the limiting hole section, a straight top rod (9) is inserted into the top rod guide sleeve (10) and moves in the top rod guide sleeve (10), and the straight top block (7) is located above the limiting hole section and is fixedly connected with the top of the straight top rod (9).

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