CN111361099A

CN111361099A - Shrinkage compensation slider structure

Info

Publication number: CN111361099A
Application number: CN202010301435.5A
Authority: CN
Inventors: 黄小明; 何益林; 林清华; 邓焯毅; 刘源昌; 何智敏
Original assignee: Foshan Nanhai Huada Takagi Mold Co ltd
Current assignee: Foshan Nanhai Huada Takagi Mold Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-07-03

Abstract

The invention discloses a shrinkage compensation sliding block structure which comprises a first template and a second template which are spliced to form a forming area, wherein the first template is separated from the second template along the die opening direction when a die is opened; a forming part is arranged in the forming area, a hole position is arranged on the forming part, a sliding block seat is arranged on the second template, a sliding block can be movably arranged on the sliding block seat, the back of the sliding block is abutted against the side wall of the forming part, the hole position is arranged on the side wall, the hole position is located in the range of the back of the sliding block, and the back of the sliding block is matched with the forming area for injection molding to form a; the axial of hole site is the contained angle setting with the die sinking direction, and the activity direction of slider is perpendicular with the die sinking direction, and slider seat bottom is equipped with the elastic component that is used for compensating the formed part shrink distance, and the compensation direction and the die sinking direction of elastic component are unanimous. The invention is used for solving the problems that the side wall of a product is higher, the bottom of the product is provided with a hole site, and the hole site is deformed or strained due to the fact that the product shrinks under the condition that a sliding block is not completely separated in the die opening process of a die.

Description

Shrinkage compensation slider structure

Technical Field

The invention relates to the field of die mechanisms, in particular to a shrinkage compensation sliding block structure.

Background

The sliding block structure is a mechanism which is applied to a mold and can drag the positions of product back-off, low trap and the like by obtaining lateral core-pulling or lateral parting and resetting actions.

At present, in injection mold's course of working, many plastic products all have the back-off, can not normally demold and ejecting product, and among the prior art, often adopt the slider structure, slide according to perpendicular and the compound die direction of opening and shutting or with opening and shutting the compound die direction and be certain angle through the slider structure in the grinding apparatus, solve the drawing of patterns problem of product back-off.

In the process of using the slider structure to loose core the drawing of patterns to the product, when the lateral wall of product is higher and the bottom is provided with the hole site, at the in-process of drawing of patterns, the slider has not broken away from completely yet, and the product just has produced the shrink because of the shrinkage factor of self material, leads to the hole site on the product to warp or the condition of strain to take place, leads to the product defective rate to promote.

Therefore, it is necessary to research and develop a slider structure capable of compensating for the distance generated by product shrinkage during mold opening, so as to solve the problem that the defective rate of the product is increased due to deformation or strain of the hole site of the product caused by incomplete separation of the slider and shrinkage of the product during mold opening of the mold.

Disclosure of Invention

The invention aims to provide a slider structure capable of compensating distance change generated by shrinkage of a plastic product, which is used for solving the problems that the side wall of the product is higher, a hole site is arranged at the bottom of the product, and the hole site is deformed or strained due to shrinkage of the product under the condition that a slider is not completely separated in the mold opening process of a mold.

In order to achieve the above object, the present invention provides a shrinkage compensation slider structure, which comprises the following specific embodiments:

a shrinkage compensation slider structure comprises a first template and a second template, wherein the first template and the second template are spliced to form a molding area, and the first template is separated from the second template along the die opening direction when the die is opened; a forming part is arranged in the forming area, a hole position is arranged at the bottom of the forming part, a sliding block seat is arranged on the second template, a sliding block movably connected with the sliding block seat is arranged on the sliding block seat, the back of the sliding block is abutted against the side wall of the forming part, the hole position is arranged on the side wall, the hole position is located in the range of the back of the sliding block, and the back of the sliding block and the forming area are matched for injection molding to form the hole position; the axial of hole site with the die sinking direction is the contained angle setting, the activity direction of slider with the die sinking direction is perpendicular, slider seat bottom both sides are equipped with the elastic component that is used for compensating the formed part shrink distance, just the compensation direction of elastic component with the die sinking direction is unanimous.

At present, the slider structure among the prior art is that the slider direct mount is in the cell body that is equipped with on the second template, through set up the spout at the slider lower extreme, sets up the protruding edge of slip and cooperatees with the cell body upper end, sets up the spring that is used for promoting the slider fast demoulding in the cell body to when making the slider accomplish the drawing of patterns under the elastic action of spring, reduce the wearing and tearing between the oblique guide pillar of slider structure and the slider, ensure the life of mould. The shrinkage compensation slider structure aims at the problem that when a formed part with a higher side wall and a hole site arranged at the bottom of the side wall is opened, the hole site is displaced due to shrinkage of the formed part, so that the hole site is deformed or strained; by additionally arranging a movable sliding block seat structure and directly arranging an elastic part for compensating the shrinkage distance of the formed part at the bottom of the sliding block seat, in the mold opening process of a mold, when a first template and a second template are separated, the formed part shrinks due to the material shrinkage rate of the formed part, so that a hole position shrinks along with the formed part, meanwhile, the acting force acting on the elastic part disappears when the first template and the second template are closed, and the shrinkage distance of the formed part in the mold opening direction is compensated by the sliding block seat under the spring action of the elastic part; therefore, in the process that the formed part shrinks, the hole position at the bottom of the formed part is always matched with the back of the sliding block, and the situation that the hole position is deformed or pulled due to shrinkage of the formed part when the sliding block is not completely separated is effectively avoided.

As a further improvement of the invention, the slider seat is provided with a mounting hole, the second template is provided with a groove body, the groove body is internally provided with a screw hole matched with the mounting hole, the slider seat further comprises a distance screw penetrating through the mounting hole and screwed with the screw hole, and the distance screw and the mounting hole form a compensation area for displacement of the slider seat. Through set up the mounting hole on the slider seat and pass form the confession between the distance screw of mounting hole the compensation area of slider seat displacement, and then inject the compensation distance of slider seat under the effect of elastic component, when guaranteeing the shrink distance that can compensate the formed part, prevent the compensation distance of slider seat under the effect of elastic component exceeds the shrink distance of formed part to the hole site on the formed part warp or the condition of pulling takes place.

Further, the distance of the compensation area is equal to the contraction distance of the formed part in the direction parallel to the mold opening direction. The distance of the compensation area is set to be equal to the shrinkage distance of the formed part in the direction of the die sinking direction, the compensation distance of the slider seat under the action of the elastic part is further ensured not to exceed the shrinkage distance of the formed part, and the situation that the compensation distance of the slider seat under the action of the elastic part exceeds the shrinkage distance of the formed part, so that the hole position on the formed part is deformed or strained is prevented.

As a further improvement of the invention, the included angle formed by the axial direction of the hole position and the die opening direction is 90 degrees.

As a further improvement of the invention, the elastic member is a rubber spring, the elastic coefficient of the elastic member is in direct proportion to the shrinkage rate of the molding member, and the deformation of the elastic member is 1.5-2.5 cm. The user can change the elastic component of different elasticity coefficients according to the change of the shrinkage factor of formed part to ensure that the slider seat can compensate the formed part of different shrinkage distances, ensure the normality of the hole site of formed part bottom.

As a further improvement of the invention, the bottom of the groove body is provided with an elastic piece mounting groove, and the elastic piece is arranged in the elastic piece mounting groove. Through fixing the elastic component in the elastic component mounting groove, can avoid the elastic component to lead to because self have great elastic deformation after the mould die sinking the elastic component is in after the sliding block seat carries out compensation displacement, resume to its position of non-pressure state's in-process and change, cause the slider structure back that resets, the condition that the elastic component can't be used in respectively sliding block seat bottom and second template takes place.

As a further improvement of the invention, the slide block is provided with a pressing strip which is fixedly connected with the slide block seat through a fixing screw. The slider is pressed tightly on the slider seat through the pressing strip, so that the slider is prevented from shaking or shifting in the die sinking process, the formed part is damaged, and the product reject ratio is improved.

As a further improvement of the invention, a slider seat mounting groove with the same height as the slider seat is arranged in the groove body, and the slider seat is arranged in the slider seat mounting groove. Through setting up the take-up housing in the take-up housing mounting groove to through the cell body is with the rest and the first template amalgamation of slider structure, make the elastic component of take-up housing bottom be in compression state under the effect of first template and second template when the compound die, possess the elastic force that acts on the take-up housing bottom.

Further, the top of the elastic piece is abutted against the bottom of the sliding block seat.

As a further improvement of the invention, a sliding convex edge is arranged on the sliding block seat, a sliding groove matched with the sliding convex edge is arranged at the lower end of the sliding block, and the sliding convex edge can be movably inserted in the sliding groove. But with slider and slider seat through the cooperation swing joint of protruding edge of slip and spout for the slider can produce the displacement with the slider seat at the die sinking in-process, thereby with the formed part separation, makes the formed part can demold smoothly, and can reset through the cooperation of protruding edge of slip and spout during the compound die.

Compared with the prior art, the shrinkage compensation sliding block structure provided by the invention also has the following beneficial effects:

1. newly add slider seat mechanism, set up the mounting hole on the slider seat and pass the confession that forms between the distance screw of mounting hole the compensation area of slider seat displacement, and then inject the compensation distance of slider seat under the effect of elastic component, when guaranteeing to compensate the shrink distance of formed part, prevent the slider seat compensation distance exceeds the shrink distance of formed part under the effect of elastic component to the hole site that causes on the formed part warp or the condition emergence of strain, and then strengthen the safety in utilization and the life of this slider structure, improve the qualification rate of product.

2. Will the regional distance of compensation sets to and the formed part is equal at the ascending shrink distance of mould opening direction's side, further ensures that the compensation distance of slider seat under the effect of elastic component does not exceed the shrink distance of formed part, prevents the compensation distance of slider seat under the effect of elastic component exceeds the shrink distance of formed part to the hole site on the formed part warp or the condition of strain takes place, further strengthens the safety in utilization and the life of this slider structure, improves the qualification rate of product.

Drawings

FIG. 1 is a schematic structural view of a shrinkage compensation slider structure of the present invention;

FIG. 2 is an enlarged partial view of portion A of FIG. 1 in accordance with the present invention;

fig. 3 is a partially enlarged view of portion B of fig. 2 of the present invention.

Detailed Description

The shrinkage compensation slider structure of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, the shrinkage compensation slider structure includes a first mold plate 1 and a second mold plate 2, the first mold plate 1 and the second mold plate 2 are spliced to form a molding area, a molded part 3 is disposed in the molding area, and when the mold is opened, the first mold plate 1 is separated from the second mold plate 2 along a mold opening direction Y.

As shown in fig. 2-3, be equipped with the cell body on the second template 2, be equipped with slider seat 4 in the cell body, be equipped with slider 6 on the slider seat 4, slider 6 with slider seat 4 swing joint, the back of slider 6 with the lateral wall of formed part 3 is inconsistent, the bottom of formed part 3 is equipped with hole site 31, hole site 31 sets up on the lateral wall, hole site 31 is located the within range at 6 backs of slider, and 6 backs of slider with the regional cooperation of shaping is moulded plastics and is formed hole site 31.

Specifically, the moving direction of the slider 6 and the slider seat 4 is perpendicular to the mold opening direction Y.

In particular, the holes 31 are injection molded by the shape on the slider 6.

Specifically, the axial direction of the hole site 31 and the mold opening direction Y form an included angle.

Further, an included angle formed by the axial direction of the hole sites 31 and the die opening direction Y is 120-240 degrees.

The bottom of the slider seat 4 is provided with an elastic piece 7, and the elastic pieces 7 are respectively arranged on two sides of the slider seat 4.

Specifically, the elastic coefficient of the elastic member 7 is proportional to the shrinkage rate of the molding member 3; the deformation of the elastic piece 7 is 1.5-2.5 cm.

Specifically, the setting user of the elastic member 7 can select the setting number, specification and stress condition of the elastic member 7 according to the elastic force required by the slider seat 4 to compensate the contraction distance of the hole site 31 and the elastic force of the elastic member 7 itself.

Specifically, the compensation direction of the elastic element 7 is consistent with the mold opening direction Y.

The elastic member 7 in this embodiment is a rubber spring, and due to the characteristic action of the rubber spring, the installation of the elastic member 7 needs to be provided with an installation groove body in the groove body, and the sliding block seat 4 is not easily damaged in the compression and reset processes.

The sliding block seat 4 is fixedly connected with the groove body through a distance screw 5.

Specifically, be equipped with in the cell body with slider seat 4 highly equals the slider seat mounting groove, slider seat 4 mobile setting is in the slider seat mounting groove, be equipped with the screw in the cell body, be equipped with mounting hole 41 on slider seat 4, distance screw 5 passes installation 41 with the screw is twisted soon and is connected, will slider seat 4 is fixed on second template 2.

Further, the distance screw 5 and the mounting hole 41 form a compensation area 42 for the displacement of the slide holder 4. Through the mounting hole 41 arranged on the slider seat 4 and the compensation area 42 formed between the distance screws 5 penetrating through the mounting hole 41, the compensation distance of the slider seat 4 under the action of the elastic part 7 is further limited, the contraction distance of the molded part 3 can be compensated, and meanwhile, the situation that the compensation distance of the slider seat 4 under the action of the elastic part 7 exceeds the contraction distance of the molded part 3, so that the hole position 31 on the molded part 3 is deformed or strained is prevented.

Specifically, the compensation area 42 is equal to the contraction distance of the molded article 3 in the mold opening direction Y. Further, the compensation distance of the slider seat 4 under the action of the elastic member 7 is ensured not to exceed the contraction distance of the molded part 3, and the situation that the compensation distance of the slider seat 4 under the action of the elastic member 7 exceeds the contraction distance of the molded part 3, so that the hole position 31 on the molded part 3 is deformed or strained is prevented.

An elastic piece mounting groove is formed in the bottom of the groove body, one end of the elastic piece 7 is fixed in the elastic piece mounting groove 43, and the other end of the elastic piece is abutted to the bottom of the sliding block seat 4. Through fixing elastic component 7 in the elastic component mounting groove, can avoid elastic component 7 to lead to because self have great elastic deformation after the mould die sinking elastic component 7 is in slider seat 4 compensates the displacement back, resumes to the in-process of no pressure state its position and changes, causes the slider structure back that resets, the condition that elastic component 7 can't be used in respectively on the cell body on slider seat 4 bottom and the second template takes place.

Wherein, be equipped with layering 8 on the slider 6, layering 8 through set screw 81 with slider seat 4 fixed connection prevents that slider 6 from producing in the die sinking process and rocking or shifting, causes the damage of formed part 3, and the condition that improves the product defective rate takes place.

The slider seat 4 is provided with a sliding convex edge, the lower end of the slider 6 is provided with a sliding groove which is movably matched with the sliding convex edge, so that the slider 4 can generate displacement with the slider seat 6 in the die opening process, and is separated from the formed part 3, the formed part 3 can be smoothly demoulded, and the sliding convex edge and the sliding groove can be matched for resetting in the die closing process.

The principle of the shrinkage compensation slider structure of the invention for compensating the shrinkage distance of the hole site 31 on the formed part 3 is as follows:

firstly, in the mold opening process of the mold, the first template 1 moves along the mold opening direction Y to be separated from the second template 2;

then, while first template 1 and second template 2 are separated, the temperature of formed part 3 is lowered, resulting in shrinkage of formed part 3 according to its own shrinkage rate, and shrinkage displacement of hole site 31 on the bottom of formed part 3;

finally, when the formed part 3 contracts, the elastic part 7 arranged at the bottom of the slider seat 4 disappears due to the pressure acting on the elastic part 7 caused by the separation of the first template 1 and the second template 2, and the elastic force of the elastic part 7 which is elastically deformed and reset acts on the slider seat 4, so that the slider 6 moves in the compensation area 42 range, and the contraction distance of the hole position 31 is compensated.

Specifically, the mold opening direction refers to a direction of opening and closing movement of the first mold plate 1 and the second mold plate 2.

The shrinkage compensation sliding block structure has the advantages of simple structure and long service life, and can compensate the displacement distance of hole sites of a formed part caused by shrinkage through the elastic action of the elastic part, so that the problems that the side wall of a product is higher, the hole sites are arranged at the bottom of the product, and the hole sites are deformed or pulled due to shrinkage of the product under the condition that the sliding block is not completely separated in the mold opening process of a mold.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A shrinkage compensation slider structure comprises a first template and a second template, wherein the first template and the second template are spliced to form a molding area, and the first template is separated from the second template along the die opening direction when the die is opened; the forming die is characterized in that a forming part is arranged in the forming area, a hole site is arranged on the forming part, a slider seat is arranged on the second template, a slider movably connected with the slider seat is arranged on the slider seat, the back of the slider is abutted against the side wall of the forming part, the hole site is arranged on the side wall, the hole site is located in the range of the back of the slider, and the back of the slider and the forming area are matched for injection molding to form the hole site; the axial of hole site with the die sinking direction is the contained angle setting, the activity direction of slider with the die sinking direction is perpendicular, slider seat bottom both sides are equipped with the elastic component that is used for compensating the formed part shrink distance, just the compensation direction of elastic component with the die sinking direction is unanimous.

2. The shrinkage compensation slider structure according to claim 1, wherein the slider seat is provided with a mounting hole, the second template is provided with a slot body, the slot body is provided with a screw hole matched with the mounting hole, the shrinkage compensation slider structure further comprises a distance screw passing through the mounting hole and screwed with the screw hole, and the distance screw and the mounting hole form a compensation area for displacement of the slider seat.

3. The shrinkage-compensating slider structure according to claim 2, wherein the distance of the compensation region is equal to the shrinkage distance of the molding member in the mold-opening direction.

4. The shrinkage-compensating slider structure of claim 1, wherein the axial direction of said hole site forms an angle of 90 ° with said opening direction.

5. The shrinkage compensation slider structure according to claim 1, wherein the elastic member is a rubber spring, and an elastic coefficient of the elastic member is proportional to a shrinkage rate of the molding member, and a deformation amount of the elastic member is 1.5-2.5 cm.

6. The shrinkage compensation slider structure of claim 2, wherein an elastic member mounting groove is formed at the bottom of the groove body, and the elastic member is disposed in the elastic member mounting groove.

7. The shrinkage compensation slider structure of claim 1, wherein a bead is disposed on the slider, and the bead is fixedly connected to the slider seat by a fixing screw.

8. The shrinkage compensation slider structure of claim 2, wherein a slider seat mounting slot having the same height as the slider seat is provided in the tank, and the slider seat is disposed in the slider seat mounting slot.

9. The shrinkage-compensating slider structure of claim 8, wherein said spring top abuts said slider-housing bottom.

10. The shrinkage compensation slider structure of claim 1, wherein the slider seat has a sliding ledge at an upper end thereof, and the slider has a sliding groove at a bottom end thereof, the sliding ledge being movably inserted into the sliding groove.