WO2021248778A1

WO2021248778A1 - Fixing mechanism for mold

Info

Publication number: WO2021248778A1
Application number: PCT/CN2020/124024
Authority: WO
Inventors: 张云飞; 胡金敏; 王昱皓
Original assignee: 永高股份有限公司
Priority date: 2020-06-10
Filing date: 2020-10-27
Publication date: 2021-12-16
Also published as: CN111645269A

Abstract

The present invention belongs to the field of injection mold technology and provides a fixing mechanism for a mold. The present invention solves the problem where currently a pipe and a rotating copper member are separated into two processing steps. The present mold comprises an upper mold and a lower mold, and upon combining the upper mold and the lower mold, a forming cavity can be formed, and a slidable slide block is provided on the lower mold, the slide block cooperates with the upper mold by means of a slanted guide pillar, wherein the fixing mechanism comprises a first core fixedly connected on the slide block, an inner end of the first core able to extend into the forming cavity is a positioning part used for sleeving a rotating copper member, an elastic member and a steel ball are provided in the positioning part, and under the action of elastic force from the elastic member, the steel ball can be partially positioned outside of the positioning part and inset in an inner thread of the rotating copper member. The present mold can inset and fix the rotating copper member in a pipe while forming the pipe, and possesses high processing efficiency.

Description

Fixing mechanism of mould

Technical field

The invention belongs to the technical field of injection molds, and relates to a mold fixing mechanism.

Background technique

Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding. During injection molding, it is often necessary to inject some pipes and joints, and some pipes and joints include straight pipe parts and arc-shaped pipe parts.

Existing pipe injection molds, for example, Chinese patent literature discloses a core-pulling mechanism for the inclined guide column of a curved pipe mold [application number: 201220146820.8; authorization announcement number: CN202640709U], which includes a fixed mold seat plate and a movable mold seat plate. The mold base plate is connected to the fixed mold plate and the lock module, the mold feet are installed on the movable mold base plate, the thimble plate and the thimble compound plate are arranged between the mold feet, the movable mold compound plate is installed on the mold feet, and the movable mold plate is installed on the movable mold compound plate. The mold cavity is formed between the template and the fixed template. Large sliders are installed on both sides of the movable mold compound plate. There are pressure bars on both sides of the large slider. The slider is connected to the core fixing plate, the core is installed on the core fixing plate, and the oblique guide post is connected under the fixed mold base plate, and the oblique guide post passes through the small slider.

In actual use of the pipe, it is often necessary to insert a fixed rotating copper piece, that is, a copper insert, at the end of the pipe, so that the pipe can be connected to a joint or other pipes. The curved tube mold of this structure is processed by first processing the curved tube, and then the rotating copper piece is embedded and fixed to the end of the tube by another equipment or manually by glue bonding, and then divided into two parts for processing and processing. low efficiency. At the same time, the curved tube mold with this structure produces a tube similar to a straight tube bent at a certain angle, except that it has a short arc-shaped side wall at the bend, and most of it is still straight. Obviously, the curved tube mold of this structure cannot produce an arc-shaped tube.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned problems in the prior art and propose a mold fixing mechanism, and the technical problem to be solved is how to embed and fix the rotating copper part in the pipe while the pipe is being formed.

The object of the present invention can be achieved by the following technical solutions: a mold fixing mechanism, the mold includes an upper mold and a lower mold, the upper mold and the lower mold can form a molding cavity after being closed, and the lower mold is provided with energy A sliding slider, the slider and the upper mold are matched by an inclined guide column structure, and is characterized in that the fixing mechanism includes a first core fixedly connected to the slider, and the first core can extend into The inner end into the molding cavity is a positioning part for sleeved rotating copper parts. The positioning part is provided with an elastic part and a steel ball. Under the action of the elastic force of the elastic part, the steel ball can be partially located outside the positioning part and embedded in the positioning part. Rotate the internal thread of the copper piece.

Put the rotating copper part outside the positioning part. Because the positioning part is equipped with elastic parts and steel balls, the steel balls are affected by the elastic force of the elastic parts, so that the steel balls are embedded in the internal threads of the rotating copper parts, and only need to rotate the rotating copper parts to make the rotation The copper piece is installed in place and positioned so that the rotating copper piece will not move on the positioning part. After closing the mold, inject molten plastic into the molding cavity, so that the rotating copper part can be embedded and fixed in the tube when the tube is formed. The tube forming and the installation of the rotating copper part can be completed in one step, and the processing efficiency is high. The steel ball is affected by the elastic force of the elastic part, and the position of the steel ball is elastic. The steel ball cooperates with the internal thread of the rotating copper part, so that the rotating copper part can be positioned more flexibly. At the same time, there is no jamming problem during mold ejection, which reduces the probability of mold collision. .

In the above-mentioned fixing mechanism of a mold, the first core has a through sliding channel, the positioning part of the first core has a through mounting hole, and the mounting hole is close to the outer surface of the rotating copper piece. The inner diameter of the end is smaller than the outer diameter of the steel ball, the inner end of the mounting hole is communicated with the sliding channel, the elastic member and the steel ball are both located in the mounting hole, and the inner end of the mounting hole is blocked by a plug. The elastic piece and the steel ball can be installed in the installation hole through the sliding channel, and the installation is convenient.

In the above-mentioned fixing mechanism for a mold, the first core includes a core body one and a core body two. The two cores are both arranged along the length direction of the sliding channel. This structure makes it easy to install the elastic parts and steel balls. Several groups of elastic parts and steel balls can be installed at the positioning part. The steel balls are arranged along the spiral line of the internal thread of the rotating copper part. Even if one of the elastic parts and steel balls fails, it can still be normal. Work.

In the above-mentioned fixing mechanism of the mold, the cross section of the sliding channel is square and rounded at the corners.

In the above-mentioned fixing mechanism of the mold, the slider includes a sliding part and a fixing part, the fixing part has a through hole therethrough, and the outer end of the first core has a convex edge that is annularly convex The first core passes through the through hole, the protruding edge is located between the sliding part and the fixed part, and the sliding part and the fixed part are fixedly connected by a fastener. This structure makes it convenient to fix the first core, and makes rational use of space, so that the outside of the slider can be relatively flat, and there will be no jamming problem when moving.

In the above-mentioned mold fixing mechanism, the top of the lower mold is provided with a rotatable rotating plate, the sliding block is slidably connected to the rotating plate, and the second core is fixedly connected to the rotating plate, so The second core passes through the slider and the first core, and the inner end of the second core that can extend into the molding cavity is an arc-shaped molding part. This structure enables the mold to process arc-shaped pipes. When the mold is opened, the oblique guide column structure drives the slider to slide outward along the rotating plate, and the first core moves outward with the slider to separate the first core Rotate the copper part, after the mold is opened, the rotating plate rotates to drive the first core, the sliding block and the second core to rotate as a whole, so that the molding part is separated from the product; the rotation path and displacement of the rotating plate are related to the shape and length of the molding part If it is suitable, it is ensured that the forming part of the second core is not stuck when the rotating plate rotates and drives the forming part of the second core to separate from the product.

In the above-mentioned fixing mechanism of the mold, the second core further includes a connecting part, the connecting part is fixedly connected with the molding part and is an integral structure, and the cross-section of the connecting part is square and is in a corner. The place is rounded. The connecting part passes through the sliding channel, and the connecting part is adapted to the sliding channel, so that the positioning stability of the first core and the second core is good, and there is no problem of offset.

In the above-mentioned mold fixing mechanism, the lower mold is provided with a rotating shaft, a number of bearings are arranged between the rotating shaft and the lower mold, and the top of the rotating shaft is circumferentially positioned with the rotating plate, so The bottom of the rotating shaft is fixedly connected with a gear, and the lower mold is also provided with a rack that can be driven to translate, and the rack is meshed with the gear. The movement of the rack can drive the gear to rotate, thereby rotating the rotating shaft, and finally driving the rotating plate to rotate, so that the forming part enters the forming cavity or leaves the forming cavity. The setting of the bearing makes the rotating shaft rotate smoothly, so that the rotating plate does not move when moving. It will jam, because this mold can process arc-shaped pipes.

In the above-mentioned fixing mechanism for a mold, the lower mold has a lower insert for forming a molding cavity, a side wall at the bottom of the lower insert has a recessed notch, and the rotating plate is partly located In the gap, the top of the rotating shaft extends into the gap and is positioned circumferentially with the rotating plate. The setting of the notch allows the rotating plate to be partially embedded, making reasonable use of space and reducing the installation space occupied; at the same time, the top of the rotating shaft extends into the notch and is positioned in the circumferential direction of the rotating plate, so that the rotation of the rotating plate is not susceptible to external interference, so that the rotating plate is in Will not get stuck when moving.

In the above-mentioned fixing mechanism for a mold, a guide rail is fixedly connected to the rotating plate, a guide groove is provided at the bottom of the slider, the guide rail passes through the guide groove, and the slider is clamped with the guide rail and The slider can move along the guide rail. The sliding block moves smoothly and there is no shaking problem, so that the rotating copper parts are installed with high precision and will not fall off.

Compared with the prior art, the mold fixing mechanism provided by the present invention has the following advantages:

1. This mold can process arc-shaped pipes, and the rotating copper parts are fixed at the ports of the arc-shaped pipes. The tube forming and the installation of the rotating copper parts are processed in one step, and the processing efficiency is high.

2. This mold locates the rotating copper parts through the cooperation of the steel balls and the elastic parts, so that the rotating copper parts can be positioned more flexibly. At the same time, there is no jamming problem when the mold is ejected, and the probability of mold collision is reduced.

3. The first core of this mold is formed by splicing two parts to make the installation of elastic parts and steel balls convenient. At the same time, several groups of elastic parts and steel balls can be installed at the positioning part. Even if one of the elastic parts and steel balls fails, it can still be normal. Work to reduce the failure rate.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the molding cavity of the mold.

Figure 2 is a cross-sectional view of the mold along the axis of rotation.

Fig. 3 is a schematic diagram of the structure of the fixing mechanism of the rotating copper part of the mold.

Figure 4 is an exploded view of the mold slider, rotating plate, first core and second core.

Figure 5 is a schematic diagram of the structure of the lower insert of the mold.

In the figure, 1. Upper mold; 2. Lower mold; 3. Molding cavity; 4. Slider; 41. Sliding part; 42. Fixed part; 421. Through hole; 5. Oblique guide column structure; 6. First core 61. Positioning part; 62. Sliding channel; 63. Mounting hole; 64. Protruding edge; 65. Core one; 66. Core two; 7. Rotating copper part; 8. Elastic part; 9. Steel ball; 10. 11. Rotating plate; 11, second core; 111, forming part; 112, connecting part; 12, rotating shaft; 13, bearing; 14, gear; 15, rack; 16, lower insert; 161, notch; 17 , Guide rail; 18. Guide groove.

detailed description

The following are specific embodiments of the present invention combined with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in Figure 1 and Figure 2, the mold includes an upper mold 1, a lower mold 2, a sliding block 4, an oblique guide column structure 5, a first core 6, a rotating plate 10, a second core 11, a rotating shaft 12, and a rotating shaft. The fixing mechanism of the copper piece 7. After the upper mold 1 and the lower mold 2 are closed, a molding cavity 3 can be formed. The fixing mechanism includes a first core 6, an elastic member 8 and a steel ball 9.

The rotating shaft 12 is set in the lower mold 2. In this embodiment, three bearings 13 are provided between the rotating shaft 12 and the lower mold 2. The bearings 13 ensure the coaxiality of the rotating shaft 12. In actual production, the number of bearings 13 can be Two or four. A gear 14 is fixedly connected to the bottom of the rotating shaft 12, a rack 15 is provided in the lower mold 2, and the rack 15 is meshed with the gear 14. A mounting frame is fixedly connected to the side of the lower mold 2, and an oil cylinder is fixedly connected to the mounting frame. The oil cylinder is connected to the rack 15 and the oil cylinder can push the rack 15 to translate. The lower mold 2 has a lower insert 16 for forming the molding cavity 3. As shown in FIG. 5, the side wall at the bottom of the lower insert 16 has a recessed notch 161. The top of the rotating shaft 12 extends into the notch 161 and is positioned in the circumferential direction of the rotating plate 10.

As shown in Figure 4, a guide rail 17 is fixedly connected to the rotating plate 10, the bottom of the slider 4 has a guide slot 18, the guide rail 17 passes through the guide slot 18, the slider 4 is clamped with the guide rail 17 and the slider 4 can follow The guide rail 17 moves. The sliding block 4 includes a sliding portion 41 and a fixing portion 42. The fixing portion 42 has a through hole 421 therethrough. The outer end of the first core 6 has an annular convex rim 64, and the first core 6 passes through the through hole. 421, the convex edge 64 is located between the sliding portion 41 and the fixing portion 42, and the sliding portion 41 and the fixing portion 42 are fixedly connected by a fastener such as a bolt or a screw. The sliding block 4 and the upper mold 1 are matched by an inclined guide column structure 5. The inclined guiding column structure 5 includes an inclined hole in the sliding block 4 and an inclined rod fixedly connected to the upper mold 1. The inclined rod can be inserted in the inclined hole .

The first core 6 has a sliding passage 62 penetrating through it. The cross section of the sliding passage 62 is square and rounded at the corners. The first core 6 includes a core 65 and a second 66, a core 65 and a core The second body 66 is buckled to form a sliding channel 62, and the first core 65 and the second core 66 are both arranged along the length direction of the sliding channel 62. As shown in Figure 3, the inner end of the first core 6 that can extend into the molding cavity 3 is a positioning portion 61 for covering the rotating copper piece 7, and the positioning portion 61 of the first core 6 has a penetrating installation Hole 63, the inner diameter of the outer end of the mounting hole 63 close to the rotating copper piece 7 is smaller than the outer diameter of the steel ball 9, the inner end of the mounting hole 63 is communicated with the sliding channel 62, the elastic member 8 is located in the mounting hole 63, and the inner diameter of the mounting hole 63 The end is blocked by a plug, and under the action of the elastic force of the elastic member 8, the steel ball 9 can be partially located outside the positioning portion 61 and embedded in the internal thread of the rotating copper member 7.

A second core 11 is fixedly connected to the rotating plate 10, the second core 11 passes through the slider 4 and the first core 6, and the second core 11 includes a connecting portion 112 and an inner portion that can extend into the molding cavity 3. The forming part 111 has an arc-shaped end. The connecting part 112 is fixedly connected to the forming part 111. The connecting part 112 and the forming part 111 are an integral structure. The cross section of the connecting part 112 is square and rounded at the corners. The connecting part 112 Go through the sliding channel 62.

Before the upper mold 1 and the lower mold 2 are closed, the rotating copper piece 7 is first placed on the positioning portion 61 of the first core 6, and the steel ball 9 is embedded in the internal thread of the rotating copper piece 7 with the cooperation of the elastic piece 8. The rotating copper piece 7 is positioned, the rack 15 moves through the gear 14 to drive the rotating shaft 12 to rotate, so that the rotating plate 10 rotates in place, so that the forming part 111 of the second core 11 is moved into the forming cavity 3. The upper mold 1 and the lower mold 2 are closed, and the slider 4 is driven to move inward under the action of the inclined guide column structure 5, so that the positioning portion 61 of the first core 6 is located in the molding cavity 3, and the rotating copper piece 7 is located Molding cavity 3. The molten plastic is injected into the molding cavity 3, and after cooling and molding, the upper mold 1 and the lower mold 2 are opened, and the slider 4 is driven to move outward under the action of the inclined guide column structure 5, thereby positioning the first core 6 The part 61 separates from the rotating copper piece 7 and leaves the molding cavity 3. The upper mold 1 and the lower mold 2 are opened in place, and the oil cylinder pulls the rack 15 to move, thereby driving the rotating plate 10 to rotate through the gear 14 and the rotating shaft 12, and the slider 4, the first core 6 and the second core 11 rotate synchronously, The forming part 111 of the second core 11 is separated from the product to complete the core pulling of the product, and then the product is pushed down to realize the blanking. Repeat the above steps to complete the production and processing of multiple products.

The specific embodiments described herein are merely examples to illustrate the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the specific embodiments described or use similar alternatives, but they will not deviate from the spirit of the present invention or exceed the definitions defined in the appended claims. Range.

Although this article uses the upper mold 1, the lower mold 2, the molding cavity 3, the slider 4, the sliding part 41, the fixed part 42, the through hole 421, the oblique guide column structure 5, the first core 6, the positioning part 61 , Sliding channel 62, mounting hole 63, flange 64, core one 65, core two 66, rotating copper part 7, elastic part 8, steel ball 9, rotating plate 10, second core 11, forming part 111, connection Terms such as the portion 112, the rotating shaft 12, the bearing 13, the gear 14, the rack 15, the lower insert 16, the notch 161, the guide rail 17, and the guide groove 18, but the possibility of using other terms is not excluded. These terms are used only to describe and explain the essence of the present invention more conveniently; to interpret them as any additional limitation is contrary to the spirit of the present invention.

Claims

A mold fixing mechanism. The mold includes an upper mold (1) and a lower mold (2). After the upper mold (1) and the lower mold (2) are closed, a molding cavity (3) can be formed, and the lower mold ( 2) A slidable slider (4) is provided on the slider (4), the slider (4) and the upper mold (1) are matched by an inclined guide column structure (5), and the feature is that the fixing mechanism includes a fixed connection The first core (6) on the slider (4), the inner end of the first core (6) that can extend into the molding cavity (3) is used for positioning the rotating copper piece (7) Part (61), the positioning part (61) is provided with an elastic member (8) and a steel ball (9), and under the action of the elastic force of the elastic member (8), the steel ball (9) can be partially located in the positioning part (61) Externally and embedded in the internal thread of the rotating copper piece (7).
The mold fixing mechanism according to claim 1, wherein the first core (6) has a sliding channel (62) penetrating through it, and the positioning portion (6) of the first core (6) 61) has a through mounting hole (63), the inner diameter of the outer end of the mounting hole (63) close to the rotating copper piece (7) is smaller than the outer diameter of the steel ball (9), and the inner end of the mounting hole (63) and The sliding channel (62) is in communication, the elastic member (8) and the steel ball (9) are both located in the mounting hole (63), and the inner end of the mounting hole (63) is blocked by a plug.
The mold fixing mechanism according to claim 2, characterized in that the first core (6) includes a core body one (65) and a core body two (66), and the core body one (65) The sliding channel (62) is formed after being fastened with the second core body (66), and the first core body (65) and the second core body (66) are both arranged along the length direction of the sliding channel (62).
The mold fixing mechanism according to claim 2, wherein the cross section of the sliding channel (62) is square and rounded at the corners.
A mold fixing mechanism according to any one of claims 1-4, wherein the slider (4) includes a sliding portion (41) and a fixing portion (42), and the fixing portion (42) There is a through hole (421) therethrough, the outer end of the first core (6) has a convex edge (64) that is annularly convex, and the first core (6) passes through the through hole (421) The convex edge (64) is located between the sliding part (41) and the fixed part (42), and the sliding part (41) and the fixed part (42) are fixedly connected by a fastener.
A mold fixing mechanism according to any one of claims 1-4, wherein the top of the lower mold (2) is provided with a rotatable rotating plate (10), and the slider (4) Slidingly connected to the rotating plate (10), the rotating plate (10) is fixedly connected with a second core (11), and the second core (11) passes through the slider (4) and the first core (6), the inner end of the second core (11) that can extend into the molding cavity (3) is an arc-shaped molding part (111).
A mold fixing mechanism according to claim 6, characterized in that, the second core (11) further comprises a connecting portion (112), and the connecting portion (112) is fixed to the molding portion (111). The connecting part (112) has a square cross-section and rounded corners.
A mold fixing mechanism according to claim 6, characterized in that a rotating shaft (12) is provided in the lower mold (2), and a rotating shaft (12) is provided between the rotating shaft (12) and the lower mold (2). There are several bearings (13), the top of the rotating shaft (12) is circumferentially positioned with the rotating plate (10), the bottom of the rotating shaft (12) is fixedly connected with a gear (14), and the lower die (2) ) Is also provided with a rack (15) that can be driven to translate, and the rack (15) meshes with the gear (14).
A mold fixing mechanism according to claim 8, characterized in that, the lower mold (2) has a lower insert (16) for forming a molding cavity (3), and the lower insert (16) ) There is a recess (161) on the side wall at the bottom, the rotating plate (10) is partially located in the gap (161), and the top of the rotating shaft (12) extends into the gap (161) Circumferential positioning with the rotating plate (10).
A mold fixing mechanism according to claim 6, characterized in that a guide rail (17) is fixedly connected to the rotating plate (10), and a guide groove (18) is provided at the bottom of the sliding block (4), The guide rail (17) passes through the guide groove (18), the slider (4) is clamped with the guide rail (17), and the slider (4) can move along the guide rail (17).