WO2022028178A1

WO2022028178A1 - Tubular injection mold

Info

Publication number: WO2022028178A1
Application number: PCT/CN2021/104463
Authority: WO
Inventors: 曾智
Original assignee: 苏州联开精密模具有限公司
Priority date: 2020-08-05
Filing date: 2021-07-05
Publication date: 2022-02-10
Also published as: CN213166597U

Abstract

The present utility model relates to the field of molds. Disclosed is a tubular injection mold, comprising a fixed mold plate, a pushing plate and movable mold plates, guide columns being fixed on each movable mold plate, an upper end of each guide column being inserted into a first guide sleeve on the pushing plate and a second guide sleeve on the fixed mold plate in sequence; a ball bushing is provided between the guide column and the first guide sleeve; an end portion of the movable mold plate is provided with fine positioning strips, and the fine positioning strips extend out of the upper end portion of the movable mold plate and are inserted into the pushing plate and the fixed mold plate; two first wear-resisting blocks located on the left and right sides of each fine positioning strip are embedded in a first positioning groove on the pushing plate, and the width of the two first wear-resisting blocks plus the width of the fine positioning strip is equal to the width of the first positioning groove; and two second wear-resisting blocks located on the left and right sides of the fine positioning strip are embedded in a second positioning groove on the fixed mold plate, and the width of the two second wear-resisting blocks plus the width of the fine positioning strip is equal to the width of the second positioning groove. By means of the described manner, the present utility model can have relatively high positioning accuracy, and solve the problems of eccentricity and wear and tear of original molds.

Description

A tubular injection mold

technical field

The utility model relates to the field of molds, in particular to a tubular injection mold.

Background technique

In the high-cavity slender tubular mold, since each template of the high-cavity slender tubular mold is processed separately, there will be machining errors between the precise positioning grooves between the templates and the guide post and guide sleeve, and the more templates, the greater the cumulative error. Therefore, the poor positioning accuracy between the guide post and the guide sleeve will cause product eccentricity, and the longer the product and the higher the number of cavities, the more serious the eccentricity will be, and the product consistency will be poor. In addition, when the push plate of the high-cavity slender tubular mold is ejected, the imbalance of the push plate and the direct friction between the guide post and the guide sleeve are easy to cause the guide post and the guide sleeve to wear and tear, resulting in the loss of the matching clearance due to too large. Therefore, most of the time, the existing guide post and the guide sleeve only have a guiding function, and do not have a positioning function.

Utility model content

The main technical problem solved by the utility model is to provide a tubular injection mold, which can have high positioning accuracy between each template, and solve the problems of eccentricity, wear and tear existing in the original mold.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a tubular injection mold, which includes a fixed template, a push plate and a movable template, wherein a plurality of guide posts are vertically fixed on the movable template, and the push plate A first guide sleeve is fixedly embedded in the position corresponding to the guide post, and a second guide sleeve is fixedly embedded in the position corresponding to the guide post on the fixed template, and the upper ends of the guide posts are sequentially inserted in the In the first guide sleeve and the second guide sleeve; a ball bushing is arranged between the guide post and the first guide sleeve; the end of the movable template is fixedly embedded with a precise positioning strip, and the precise positioning The positioning strip is perpendicular to the movable platen, and the upper end of the precise positioning strip protruding from the movable platen is inserted on the push plate and the fixed plate in sequence; the push plate is used for the insertion of the precise positioning strip The first positioning groove is wider than the precise positioning strip, and two first wear-resistant blocks are fixedly embedded in the first positioning groove, and the two first wear-resistant blocks are symmetrically located on the left and right sides of the precise positioning strip. , the width of the two first wear-resistant blocks plus the width of the precise positioning strip is equal to the width of the first positioning groove; the second positioning groove on the fixed plate for the precise positioning strip to be inserted into is wider than the The precise positioning strip, two second wear-resistant blocks are fixedly embedded in the second positioning groove, and the two second wear-resistant blocks are symmetrically located on the left and right sides of the precise positioning strip. The width plus the width of the fine positioning bar equals the width of the second positioning groove.

Preferably, there are two movable templates, the movable template close to the push plate is defined as the second movable template, and the movable template away from the push plate is defined as the first movable template; The guide post is fixedly inserted into the first circular hole, the inner side wall of the first circular hole is provided with a first open annular groove at the end near the second movable template, and the outer side wall of the guide post corresponds to the first circular groove. An open annular groove is provided with an annular protruding portion, and the annular protruding portion is fitted and clamped in the first open annular groove; the second movable template block is provided with a fitting for the guide post to be inserted into. The second round hole of the second round hole, the end of the inner side wall of the second round hole close to the push plate is provided with a second open annular groove, and the outer side wall of the guide post is provided with a corresponding second open annular groove. An annular clamping groove, a detachable clamping spring is provided in the annular clamping groove, and a part of the structure of the clamping spring protruding from the annular clamping groove abuts on the second open annular groove.

Preferably, the precise positioning strip is fixed on the second movable module, and the lower end of the precise positioning strip protruding from the second movable module is fixed and clamped on the first movable template.

Preferably, there are four guide posts, and the four guide posts are respectively located at the four right-angle ends of the movable template; two precise positioning bars are fixedly embedded at both ends of the movable template.

Preferably, the fixed template is provided with two water passages, and the two water passages are respectively directed towards the gate die core and the cavity.

Preferably, the fixed plate is provided with a front mold blowing hole.

The beneficial effects of the utility model are as follows: the utility model increases the design of the ball bushing, so that the sliding friction is transformed into rolling friction, the friction force is reduced, and the matching gap is small, and the precise positioning strip is combined with the first wear-resistant block and The matching design of the second wear-resistant block not only has good guidance, but also effectively improves the positioning accuracy, solves the problems of eccentricity and wear and tear of the original mold, and can ensure the accuracy and service life of the push plate during the action process. , which is convenient for later maintenance. The design of the independent waterway on the gate mold core and the cavity can not only be adjusted separately to make the cooling more sufficient, but also the number of mold cavities can reach 96 cavities, which is twice as high as the highest cavity in the market for stable operation, which greatly saves manpower, material resources, while increasing production and reducing costs. The design of the front mold blowing hole can facilitate the front mold blowing, reduce the risk of mold sticking, and the post-processing of accidental mold sticking will also be more convenient, saving time and cost. The mold has smooth opening and closing action, stable ejection, fast cycle, and can achieve high cavity and high speed.

Description of drawings

Fig. 1 is the split structure schematic diagram of a kind of tubular injection mold of the present utility model;

Figure 2 is a cross-sectional structural schematic diagram of a guide column part in a tubular injection mold of the present invention;

Fig. 3 is the structural schematic diagram of the precise positioning strip part in a tubular injection mold of the present invention;

Figure 4 is a cross-sectional structural schematic diagram of a fixed template in a tubular injection mold of the present invention.

The marks of the components in the drawings are as follows: 1. Fixed template; 11. Second guide sleeve; 12. Water channel; 13. Front mold blowing hole; 2. Push plate; 21. First guide sleeve; 3. First moving template ; 4, the second movable template; 5, the guide column; 6, the ball bushing; 7, the precise positioning strip; 8, the first wear block; 9, the second wear block.

detailed description

The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, so that the protection scope of the present utility model can be more clearly defined. .

Please refer to FIG. 1 to FIG. 4, the embodiment of the present invention includes:

A tubular injection mold, comprising: a fixed template 1, a second guide sleeve 11, a push plate 2, a first guide sleeve 21, a first movable template 3, a second movable template 4, a guide post 5, a ball bushing 6, a precision The positioning strip 7 , the first wear-resistant block 8 and the second wear-resistant block 9 .

The lower ends of the guide posts 5 are vertically fixed on the movable formwork plate; the guide posts 5 have four, and the four guide posts 5 are respectively located at the four right-angle ends of the movable formwork plate. There are two movable templates, the movable template close to the push plate 2 is defined as the second movable template 4, and the movable template away from the push plate 2 is defined as the first movable template 3; There is a first circular hole for the fixed insertion of the guide post 5, and a first open annular recess is provided at the upper port of the first circular hole (the position on the inner side wall of the first circular hole close to the second movable template 4). The outer side wall of the guide post 5 is provided with an annular raised portion corresponding to the first open annular groove, and the annular raised portion is fitted and clamped in the first open annular groove; the The second movable template 4 has a second round hole for the guide post 5 to be inserted into. The upper port of the second round hole (the position on the inner side wall of the second round hole close to the push plate 2) is provided with a second round hole. Two open annular grooves, the outer side wall of the guide post 5 is provided with an annular clamping groove corresponding to the second open annular groove, and a detachable clamping spring (clamping ring) is provided in the annular clamping groove, The part of the structure on the retaining spring protruding from the annular retaining groove abuts on the second open annular groove.

Four first guide sleeves 21 are fixedly embedded in the push plate 2 , and the four first guide sleeves 21 are in one-to-one correspondence with the four guide posts 5 . Four second guide sleeves 11 are fixedly embedded in the fixed plate 1 , and the four second guide sleeves 11 are in one-to-one correspondence with the four guide posts 5 . The upper ends of the guide posts 5 can be inserted into the first guide sleeve 21 and the second guide sleeve 11 in sequence to complete the guide connection between the fixed platen 1 , the push plate 2 and the movable platen. A ball bushing 6 is arranged between the guide post 5 and the first guide bush 21 , and the upper and lower ends of the ball bushing 6 protrude from the first guide bush 21 ; the ball bushing 6 can slide The friction is transformed into rolling friction, the friction force is reduced, and the matching clearance is small, which effectively improves the positioning accuracy.

The two ends of the second movable template 4 are respectively fixed and embedded with two precise positioning bars 7, the precise positioning bars 7 are perpendicular to the second movable template 4, and the upper and lower ends of the precise positioning bars 7 both extend. For the second movable template 4, the precise positioning bar 7 protrudes from the lower end of the second movable module and is fixedly clamped on the first movable template 3, and the precise positioning bar 7 extends out of the first movable template 3. The upper ends of the two-moving template 4 are inserted on the push plate 2 and the fixed template 1 in sequence; the first positioning groove on the push plate 2 into which the precise positioning strip 7 is inserted is wider than the precise positioning strip 7. Two first wear-resistant blocks 8 are fixedly embedded in the first positioning groove. The two first wear-resistant blocks 8 are symmetrically located on the left and right sides of the precise positioning bar 7. The width of 8 plus the width of the precise positioning strip 7 is equal to the width of the first positioning slot; the second positioning slot on the fixed plate 1 for the precise positioning strip 7 to be inserted into is wider than the precise positioning strip 7 , two second wear-resistant blocks 9 are fixedly embedded in the second positioning groove, and the two second wear-resistant blocks 9 are symmetrically located on the left and right sides of the precise positioning bar 7. The two second wear-resistant blocks 9 plus the width of the precise positioning strip 7 is equal to the width of the second positioning groove. The precise positioning bar 7 can play a positioning and guiding role in the whole process of opening and closing the mold to ensure the positioning accuracy; the cooperative design of the first wear-resistant block 8 and the second wear-resistant block 9 can make the positioning accuracy higher.

The fixed template 1 is provided with two water passages 12, and the two water passages 12 correspond to the gate die core and the cavity respectively; the design of the independent water passages 12 on the gate die core and the cavity can not only be adjusted separately, but also makes the cooling more sufficient , It can also make the number of mold cavities reach 96 cavities, which is twice as high as the highest cavity in stable operation on the market, which greatly saves manpower and material resources, and reduces costs while increasing output. The fixed template 1 is also provided with a front mold blowing hole 13, so as to facilitate the front mold blowing, reduce the risk of mold sticking, and make post-processing of accidental mold sticking more convenient, saving time and cost.

In the present invention, the push plate 2 can be ensured through the cooperation of the guide post 5 with the first guide sleeve 21 and the second guide sleeve 11 , and the cooperation with the precise positioning strip 7 and the first wear-resistant block 8 and the second wear-resistant block 9 . The accuracy and service life during the action process are convenient for later maintenance. The mold has smooth opening and closing action, stable ejection, fast cycle, and can achieve high cavity and high speed.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims

A tubular injection mold comprises a fixed template, a push plate and a movable template, a plurality of guide posts are vertically fixed on the movable template, and a first guide sleeve is fixedly embedded on the push plate at a position corresponding to the guide posts, A second guide sleeve is fixedly embedded on the fixed plate at a position corresponding to the guide post, and the upper end of the guide post is inserted into the first guide sleeve and the second guide sleeve in sequence; it is characterized in that: A ball bushing is arranged between the guide post and the first guide sleeve; a precise positioning strip is fixedly embedded at the end of the movable template, the precise positioning strip is perpendicular to the movable template, and the precise positioning The upper end of the strip extending out of the movable platen is inserted on the push plate and the fixed platen in sequence; the first positioning groove on the push plate into which the precise positioning strip is inserted is wider than the precise positioning strip, Two first wear-resistant blocks are fixedly embedded in the first positioning groove, and the two first wear-resistant blocks are symmetrically located on the left and right sides of the precise positioning strip. The width of the precise positioning strip is equal to the width of the first positioning slot; the second positioning slot on the stationary platen for the precise positioning strip to be inserted into is wider than the precise positioning strip, and the second positioning slot is fixedly embedded in the second positioning slot. There are two second wear-resistant blocks, the two second wear-resistant blocks are symmetrically located on the left and right sides of the precise positioning strip, and the width of the two second wear-resistant blocks plus the width of the precise positioning strip is equal to the The width of the second positioning groove.
A tubular injection mold according to claim 1, characterized in that: there are two movable templates, the movable template close to the push plate is defined as the second movable template, and the movable template away from the push plate is defined as A first movable template; the first movable template is provided with a first circular hole for the fixed insertion of the guide post, and a first open annular ring is provided on the inner side wall of the first circular hole near the end of the second movable template a groove, the outer side wall of the guide post is provided with an annular raised portion corresponding to the first open annular groove, and the annular raised portion is fitted and clamped in the first open annular groove; the The second movable template block has a second circular hole for the guide post to be inserted into. A second open annular groove is provided on the inner side wall of the second circular hole at the end near the push plate. Corresponding to the second open annular groove, the outer side wall is provided with an annular clamping groove, a detachable clamping spring is provided in the annular clamping groove, and the part of the structure protruding from the annular clamping groove on the clamping spring abuts against the on the second open annular groove.
The tubular injection mold according to claim 2, wherein the precise positioning strip is fixed on the second movable module, and the precise positioning strip protrudes from the lower end of the second movable module to be fixed and clamped. on the first moving template.
A tubular injection mold according to claim 1, 2 or 3, characterized in that: there are four guide posts, and the four guide posts are respectively located at the four right-angle ends of the movable platen; Two precise positioning strips are fixed and embedded at both ends of the .
A tubular injection mold according to claim 1, characterized in that: the fixed template is provided with two water passages, and the two water passages correspond to the gate die core and the cavity respectively.
A tubular injection mold according to claim 1 or 5, wherein the fixed platen is provided with a front mold blowing hole.