CN106827404A - The mould that plastic enters cast gate can neatly be cut off - Google Patents

Abstract

The invention relates to a mold capable of neatly cutting the gate of a plastic part, comprising a fixed template, a sprue sleeve arranged on the fixed template, a movable template, a sprue plate rotatably arranged in the middle of the movable template, and the sprue plate More than one runners are arranged symmetrically, and the runners correspond to the mold cavity one by one through a gate. The movable template is provided with a driving sector gear, and the sprue plate is provided with a driven sector gear. The driving sector gear is meshed with the driven sector gear, and the driving sector gear is driven by an offset wedge; the sprue plate is provided with an outwardly extending inclined block near the tail of the gate, and the gate The tail of the gate is equipped with a cutting edge for cutting off the gate, and the runner plate is driven to rotate by an offset wedge when the mold is opened, so that the inclined block cooperates with the cutting edge to cut off the gate. The beneficial effect of the present invention is that: when the mold is opened, the runner plate is driven to rotate through the offset wedge, and the gate is neatly cut off during the rotation of the runner plate.

Description

A mold that can neatly cut off the gate of plastic parts

technical field

The invention relates to a mold capable of neatly cutting the gate of a plastic part.

Background technique

Injection molding is a method of injecting hot-melt plastic material into a cavity of a certain shape in the mold. After the plastic material is cooled and solidified, the mold is opened to eject the solidified plastic processed product to obtain a molded product. Since the injection molding method has the characteristics of low molding cost, short molding cycle, simple molding process and easy molding of plastic products with complex shapes, it is widely used in the field of plastic product manufacturing. After the mold is opened, the injection-molded plastic part in the mold and the aggregate at the pouring channel are always connected together and cannot be separated automatically, and the plastic part and the aggregate must be separated to produce a usable product. The current general practice is to increase the manual de-gating process, and use manual cutting and separation of plastic parts from the aggregate. On the one hand, the above-mentioned operations require staff to use special equipment to operate, resulting in high labor intensity and low production efficiency; Thin-walled products are deformed.

Contents of the invention

The object of the present invention is to provide a mold that can neatly cut off the gate of plastic parts to reduce labor costs and improve work efficiency.

The solution adopted by the present invention to solve the technical problem is: a mold capable of neatly cutting the gate of plastic parts, including a fixed template, a sprue sleeve arranged on the fixed template, a movable template, and a runner arranged in the middle of the movable template The runner plate is symmetrically provided with more than one runner, and the runner corresponds to the cavity through a gate. The movable template is provided with a driving sector gear, and the runner plate is There is a driven sector gear, the driving sector gear is meshed with the driven sector gear, and the driving sector gear is driven by an offset wedge; the sprue plate is provided with an outward Extended inclined block, the tail of the gate is equipped with a cutting edge for cutting the gate, and the runner plate is driven to rotate by the offset wedge when the mold is opened, so that the inclined block cooperates with the cutting edge to cut into the gate.

Further, the runner plate is rotatably arranged on the movable template via a bush.

Further, the movable template and the fixed template are connected through guide posts, and the guide posts are mated and connected with guide sleeves.

Further, it also includes a movable mold insert and a fixed mold insert arranged in the cavity, and the movable mold insert and the fixed mold insert are respectively arranged in the first slide block and the second slide block located in the cavity , the movable mold insert and the fixed mold insert are respectively arranged on one side of the runner plate and one side of the sprue sleeve, and are respectively compressed by bolts.

Compared with the prior art, the present invention has the following beneficial effects: each runner communicates with the mold cavity through the gate, and the tail of each gate is respectively provided with a cutting edge. When the mold is opened, the present invention The sprue plate is driven to rotate by the offset wedge, and the sprue is cut through the cooperation of the slant block on the sprue plate and the cutting edge, which does not require manual cutting, reduces labor costs, and improves mold opening efficiency.

Description of drawings

Below in conjunction with accompanying drawing, the patent of the present invention is further described.

Fig. 1 is a schematic structural diagram of a mold according to an embodiment of the present invention, which is also a cross-sectional view of E-E in Fig. 2 .

Fig. 2 is a schematic diagram of parting surface A in Fig. 1;

Fig. 3 is a schematic diagram of parting surface B in Fig. 1;

Fig. 4 is the schematic diagram of direction C in Fig. 1;

Fig. 5 is a D-D sectional view in Fig. 2 .

Fig. 6 is a schematic structural diagram of the offset wedge and the driving sector gear according to the embodiment of the present invention.

In the figure: 1-fixed mold puller; 2-movable formwork; 3-runner plate; 30-slope block; 4-gate sleeve; 5-movable mold insert; 6-fixed mold insert; 7-first slide block; 8-second slider; 9-cutting edge; 10-main runner; 11-runner; 12-inlet gate; 13-bolt; 14-guide post; 15-bush; 16-driven sector Gear; 17-driving sector gear; 18-offset wedge.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 6, a mold capable of neatly cutting the gate 12 of a plastic part in this embodiment includes a fixed template 1, a sprue sleeve 4 arranged on the fixed template 1, a movable template 2, and The sprue plate 3 in the middle of the movable formwork 2, the runner plate 3 is symmetrically provided with more than one runner 11, the runner 11 corresponds to the cavity through a gate 12, and the movable template 2 A driving sector gear 17 is provided on the sprue plate 3, a driven sector gear 17 is provided on the runner plate 3, the driving sector gear 17 and the driven sector gear 17 are meshed, and the driving sector gear 17 is biased Driven by wedge 18; the sprue plate 3 is provided with an outwardly extending inclined block 30 near the tail of the gate 12, and the tail of the gate 12 is equipped with a cutting edge 9 for cutting the gate 12, When the runner plate 3 is opened, it is driven to rotate by the biased wedge 18 , so that the ramp 30 cooperates with the cutting edge 9 to cut off the gate 12 . As can be seen from Figures 4 and 6, the driving sector gear 17 disposed on the movable template 2 meshes with the driven sector gear 17 disposed on the runner plate 3, and the driving sector gear 17 is driven by the offset wedge 18, so that The hot runner plate 3 rotates counterclockwise at a small angle, and the rotation angle is 0-15°.

As can be seen from the above, the beneficial effects of the present invention are: as can be seen from FIG. 2, the mold of the present invention is a mold with six cavities, and six runners 11 are symmetrically arranged on the runner plate 3, and each runner 11 passes through the feeder respectively. The gate 12 communicates with the mold cavity, and the tail of each gate 12 is provided with a cutting edge 9 respectively. The present invention drives the runner plate 3 to rotate through the offset wedge 18 when the mold is opened, and the runner plate 3 The inclined block 30 on the top cooperates with the cutting edge 9 to realize the removal of the gate 12 without manual removal, which reduces labor costs and improves mold opening efficiency.

In this embodiment, the runner plate 3 is rotatably arranged on the movable template 2 via a bushing 15 . A bushing 15 is provided on the outer side of the runner plate 3 , the sealing performance of the runner plate 3 is ensured through the bushing 15 , and the runner plate 3 is rotatably arranged on the movable template 2 through the bushing 15 .

In this embodiment, the movable template 2 and the fixed template 1 are connected via a guide post 14, and the guide post 14 is mated and connected with a guide sleeve. The guidance of the mold is realized through the cooperation of the guide post 14 and the guide sleeve, and the combination of the fixed template 1 and the movable template 2 is realized, ensuring that the plastic flows into the corresponding cavity through the main runner 10, the runner and the gate 12 in sequence.

In this embodiment, it also includes a movable mold insert 5 and a fixed mold insert 6 arranged in the cavity, and the movable mold insert 5 and the fixed mold insert 6 are respectively arranged on the first slide in the cavity. In the block 7 and the second slide block 8 , the movable mold insert 5 and the fixed mold insert 6 are respectively arranged on one side of the runner plate 3 and one side of the sprue sleeve 4 , and are respectively compressed by bolts 13 . The shape of the product is formed through the cooperation of the insert and the slider. The movable mold insert 5 and the fixed mold insert 6 are respectively arranged on both sides of the gate 12, and the movable mold insert 5 is arranged on one side of the runner plate 3 , when the mold is opened, in the cooperation of the movable mold insert 5 and the runner plate 3, the removal of the gate 12 is better realized.

To sum up, the present invention provides a mold capable of neatly removing the gates of plastic parts, which reduces labor costs and improves work efficiency.

The above preferred embodiments have further described the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of the present invention.

Claims (4)

1. A mold that can neatly remove the gate of plastic parts, is characterized in that: it includes a fixed template, a sprue sleeve arranged on the fixed template, a movable template, a sprue plate that is rotated and arranged in the middle of the movable template, and the sprue There are more than one runners symmetrically arranged on the channel plate, and the runners correspond to the mold cavity one by one through a gate, a driving sector gear is provided on the movable template, and a driven sector gear is provided on the runner plate. gear, the driving sector gear and the driven sector gear are meshed, and the driving sector gear is driven by an offset wedge; the sprue plate is provided with an outwardly extending inclined block near the tail of the gate, The tail of the gate is equipped with a cutting edge for cutting off the gate. When the runner plate is opened, it is driven to rotate by an offset wedge, so that the ramp and the cutting edge cooperate to cut off the gate. 2 . The mold capable of neatly and automatically cutting the gate of plastic parts according to claim 1 , wherein the runner plate is rotatably arranged on the movable template through a bush. 3 . 3. The mold capable of neatly and automatically cutting the gates of plastic parts according to claim 1, characterized in that: the movable platen and the fixed platen are connected through guide posts, and the guide posts are mated with guide sleeves. 4. The mold capable of neatly and automatically cutting the gate of plastic parts according to claim 1 is characterized in that: it also includes a movable mold insert and a fixed mold insert arranged in the cavity, the movable mold insert and the fixed mold insert The fixed mold inserts are respectively arranged in the first slider and the second slider located in the cavity, and the movable mold inserts and the fixed mold inserts are respectively arranged on one side of the sprue plate and one side of the sprue sleeve, And respectively by the bolt compression.