CN209832474U - Surrounding type multi-gate upper and lower matched lamp holder mold - Google Patents

Abstract

The utility model belongs to lamp stand injection mold field relates to a supporting lamp stand mould about many runners of formula. The technical problem that in the prior art, the lamp holder plastic part outer eaves buckle is formed to enable pressure maintaining pressure to be insufficient is solved. The forming device comprises a fixed die plate and a movable die plate, wherein a forming cavity is arranged between the fixed die plate and the movable die plate, a plurality of buckle forming structures are circumferentially distributed on the forming cavity, a sub-channel corresponding to the buckle forming structures is arranged on the movable die plate, and the sub-channel is communicated with the forming cavity. Compared with the prior art, the utility model has the advantages of size precision and intensity are high after the buckle takes shape the cooling.

Description

Surrounding type multi-gate upper and lower matched lamp holder mold

Technical Field

The utility model belongs to the technical field of lamp stand injection mold, especially, relate to a supporting lamp stand mould about many runners of centering type.

Background

The plastic lamp holder usually adopts the injection molding process to accomplish production, and the lamp holder usually needs to use with the lamp shade cooperation, and connection structure commonly used is the back-off, is provided with the back-off of being connected with the lamp holder promptly at the lamp shade lateral wall, is provided with the buckle corresponding with the back-off on the lamp holder. In the prior art, a bowl-shaped plastic part is generally injected by adopting a bottom pouring process, and under the injection molding process, molten plastic is difficult to reach a cornice of the plastic part due to the limitation of fluidity, particularly the designed connection characteristics on the cornice, the structure is complex, the pressure loss of the molten plastic is large in the filling process, the complete filling is difficult to realize, and defective products are easy to occur. In the prior art, the injection molding process parameters are changed by raising the temperature of the mold, increasing the injection molding pressure and the like to solve the technical problems. This approach inadvertently increases the performance requirements of the mold and the injection molding machine, requires the mold to have better thermal deformation resistance, higher strength, and requires the injection molding machine to be equipped with greater clamping force. Resulting in the increase of manufacturing cost and the waste of injection molding resources.

Disclosure of Invention

The utility model aims at the above-mentioned problem, a supporting lamp stand mould about surrounding type many runners is provided.

In order to achieve the above purpose, the utility model adopts the following technical proposal: this around supporting lamp stand mould about many runners of formula, including fixed die plate and movable mould board, fixed die plate and movable mould board between be provided with the shaping chamber, shaping chamber circumference distribute have a plurality of buckle forming structure, the movable mould board on be provided with the subchannel corresponding with buckle forming structure, subchannel and shaping chamber intercommunication. The plurality of runners are arranged and enter the forming cavity near the buckle forming structure, so that the buckle is ensured to have sufficient molten plastic and sufficient forming pressure, and the dimensional accuracy and the strength of the buckle after forming and cooling are ensured.

In the surrounding type multi-sprue upper and lower matched lamp holder mould, the movable mould plate is provided with a mould core protruding out of the movable mould plate, the fixed mould plate is provided with a mould cavity sinking towards the direction far away from the mould core, and the buckle forming structure is arranged in the forming cavity close to the root part of the mould core.

In the above surrounding type multi-gate upper and lower matched lamp holder mold, the buckle forming structure comprises a first buckle forming block and a second buckle forming block, the first buckle forming block is arranged on the mold core, the second buckle forming block is arranged on the mold cavity, and the first buckle forming block and the second buckle forming block are mutually abutted and connected in the mold closing process.

In the surrounding type multi-sprue upper and lower matched lamp holder mold, the first buckle forming block is provided with the first connecting surface, and the second buckle forming block is provided with the second connecting surface which is abutted and coincided with the first connecting surface when the mold is closed.

In the surrounding type multi-gate upper and lower matched lamp holder mold, the number of the sub-runners corresponds to that of the buckle forming structures, and gates of the sub-runners are respectively close to the buckle forming structures.

In the surrounding type multi-sprue upper-lower matched lamp holder mould, the sub-channels are correspondingly provided with hot nozzles fixedly connected in the fixed template, one side of the fixed template, which is far away from the movable template, is provided with a sub-channel structure, the sub-channel structure is provided with a sub-channel groove, and the sub-channel groove is communicated with the hot nozzles.

In the surrounding type multi-sprue upper and lower matched lamp holder mould, the branch structure is also provided with a main runner, and the main runner is connected with the sprue bush.

In the surrounding type multi-gate upper and lower matched lamp holder mould, the fixed mould plate is provided with an inclined guide rod in an inserting manner between the hot nozzles, the inclined guide rod is slidably connected with the side loose core, and the side loose core is slidably connected with the movable mould plate.

In the surrounding type multi-gate upper and lower matched lamp holder mould, the movable mould plate is provided with a sliding groove, and the side loose core can slide along the sliding groove.

In the surrounding type multi-gate upper-lower matched lamp holder mold, the sliding groove is provided with a positioning step, the side core pulling body is provided with a limiting surface parallel to the step surface of the positioning step, the positioning step is fixedly connected with a guide block, and the guide block is pressed on the limiting surface.

Compared with the prior art, the utility model has the advantages of:

1. the plurality of runners are arranged and enter the forming cavity near the buckle forming structure, so that the buckle is ensured to have sufficient molten plastic and sufficient forming pressure, and the dimensional accuracy and the strength of the buckle after forming and cooling are ensured.

2. The buckle forming mechanism is arranged at the eave of the forming cavity and adopts an internal and external combined structure, so that smooth demolding of the lamp holder is ensured.

3. The hot nozzle is arranged on the branch channel, so that the temperature of the molten plastic entering the forming cavity is ensured, the defects of insufficient filling, obvious welding marks and the like caused by low temperature are prevented, and the defective rate of products is further reduced.

4. And the guide block is adopted to limit the side core-pulling displacement, so that the difficulty in manufacturing the die is reduced.

Drawings

Fig. 1 is a schematic structural diagram provided by the present invention.

Fig. 2 is a cross-sectional view provided by the present invention.

Fig. 3 is a cross-sectional view of another angle provided by the present invention.

Fig. 4 is an enlarged view of the position B in fig. 3 according to the present invention.

In the figure, a fixed die plate 1, a movable die plate 2, a molding cavity 3, a buckle forming structure 4, a branch runner 5, a core 6, a cavity 7, a first buckle forming block 8, a second buckle forming block 9, a first connecting surface 10, a second connecting surface 11, a sprue 12, a hot nozzle 13, a branch runner structure 14, a branch runner groove 15, a main runner 16, an inclined guide rod 17, a side core 18, a sliding groove 19, a positioning step 20, a limiting surface 21 and a guide block 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-2, the surrounding type multi-gate upper and lower matched lamp holder mold comprises a fixed mold plate and a movable mold plate 2, wherein a molding cavity 3 is arranged between the fixed mold plate 1 and the movable mold plate 2, a plurality of buckle molding structures 4 are circumferentially distributed in the molding cavity 3, a runner 5 corresponding to the buckle molding structures 4 is arranged on the movable mold plate 2, and the runner 5 is communicated with the molding cavity 3. Get into subchannel 5 through sprue 16 when melting plastics, get into the molding cavity 3 and fill into molding cavity eaves mouth and buckle forming structure 4 earlier from subchannel 5, continue to fill the chamber wall and the chamber bottom of molding cavity 3 again, ensure that the buckle characteristic that buckle forming structure 4 corresponds has reliable precision, avoid appearing the defect of scarce material, and simultaneously, in the pressure maintaining process, the buckle characteristic has effectual pressurize pressure, make buckle characteristic recooling forming process obtain sufficient pressure again, ensure that internal structure density is balanced and tight defect such as bubble, eliminate its inside concentrated stress, ensure that the buckle characteristic has enough corresponding intensity. As is known, in the injection molding process, molten plastic shrinks when being cooled, and if the pressure is not sufficient enough, new materials cannot enter a cavity for supplement, so that the density and strength of a plastic part are affected, and even the defects of material shortage, warping and the like occur.

Specifically, a mold core 6 protruding out of the movable mold plate 2 is arranged on the movable mold plate 2, a mold cavity 7 recessed towards the direction away from the mold core 6 is arranged on the fixed mold plate 1, and the buckle forming structure 4 is arranged in the forming cavity 3 close to the root of the mold core 6. When the die is closed, the core 6 is inserted into the die cavity 7, the forming cavity 3 is arranged between the core 6 and the die cavity 7, the core 6 forms the inner surface of the lamp holder plastic part, and the die cavity 7 forms the outer side surface of the lamp holder plastic part. When the mold is opened, the lamp holder plastic part is cooled and contracted, so that the lamp holder plastic part is coated on the mold core 6, and the lamp holder plastic part is kept on the mold core 6 when the mold is opened, and is convenient to eject.

Further, the snap forming structure 4 comprises a first snap forming block 8 and a second snap forming block 9, the first snap forming block 8 is arranged on the mold core 6, the second snap forming block 9 is arranged on the mold cavity 7, and the first snap forming block 8 and the second snap forming block 9 are connected in an abutting mode when the mold is closed. When the compound die, first buckle forming block 8 supports to lean on with second buckle forming block 9 to be connected, and melting plastics can not get into between first buckle forming block 8 and the second buckle forming block 9 for the lamp stand is moulded the piece and is lacked plastics in relevant position and form the buckle.

Furthermore, the first snap forming block 8 is provided with a first connecting surface 10, and the second snap forming block 9 is provided with a second connecting surface 11, so that the first connecting surface 10 and the second connecting surface 11 are abutted and overlapped when the mold is closed. When opening the die sinking, the lamp stand moulds a shrink cladding in fixed die plate 1 that follow-up template 2 kept away from on core 6, relatively, and second buckle shaping piece 9 breaks away from the lamp stand and moulds a piece, and in the same way, when the ejector pin moulded a piece with the lamp stand and jacked up, first buckle shaping piece 8 breaks away from the lamp stand and moulds a piece, and first buckle shaping piece 8 and the split type design of second buckle shaping piece 9 ensure when forming the buckle characteristic, ensure that the lamp stand moulds a piece and can demould smoothly. Preferably, the first connecting surface 10 and the second connecting and forming surface 11 are parallel to the mold opening direction or inclined inward toward the direction of the fixed mold plate 1, so as to ensure smooth demolding of the lamp holder plastic part, and the lamp holder plastic part has a simple structure, and avoids huge manufacturing cost caused by designing a side core pulling assembly.

Preferably, the runners 5 correspond in number to the snap forming structures 4 and the gates 12 of the runners 5 are respectively close to the snap forming structures 4. The provision of a plurality of runners 5 and their entry into the forming chamber 3 in the vicinity of the clip forming structure 4 ensures that the clip features have sufficient molten plastic and sufficient forming pressure, ensuring dimensional accuracy and strength of the formed and cooled clip.

Preferably, as shown in fig. 3, the branch passages 5 are correspondingly provided with hot nozzles 13 fixedly connected in the fixed die plate 1, one side of the fixed die plate 1 away from the movable die plate 2 is provided with a branch structure 14, the branch structure 14 is provided with a branch groove 15, and the branch groove 15 is communicated with the hot nozzles 13. The channel dividing structure 14 is further provided with a main channel 16, and the main channel 16 is connected with the sprue bush. The hot nozzle 13 is arranged on the branch channel 5, so that the temperature of the molten plastic entering the molding cavity is ensured, the defects of insufficient filling, obvious welding marks and the like caused by low temperature are prevented, and the defective rate of products is further reduced. The molten plastic enters the manifold structure 14 from the main runner 16, then enters the respective hot nozzles 13 through the manifold structure 14, enters the branch runners from the hot nozzles 13, and finally enters the molding chamber 3.

More preferably, a diagonal guide rod 17 is inserted between the hot nozzles 13 on the fixed die plate 1, a side core 18 is slidably connected to the diagonal guide rod 17, and the side core 18 is slidably connected to the movable die plate 2. The movable mould plate 2 is provided with a sliding groove 19, and the side core 18 can slide along the sliding groove 19. When the plastic around the side cores 18 shrinks due to cooling, the molten plastic in the runner 5 provides bidirectional pressure to the area between the two hot nozzles 13, preventing the features formed by the side cores 18 from having defects such as dents.

Preferably, the sliding groove 19 is provided with a positioning step 20, the side core 18 is provided with a limiting surface 21 parallel to the step surface of the positioning step 20, the positioning step 20 is fixedly connected with a guide block 22, and the guide block 22 is pressed on the limiting surface 21. Compared with the mode of slidably connecting the side core-pulling 18 through the T-shaped connecting groove, the side core-pulling displacement is limited through the guide block, and the difficulty in manufacturing the die is reduced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the fixed die plate 1, the movable die plate 2, the molding cavity 3, the snap forming structure 4, the runner 5, the core 6, the cavity 7, the first snap forming block 8, the second snap forming block 9, the first connecting surface 10, the second connecting surface 11, the gate 12, the hot nozzle 13, the runner structure 14, the runner groove 15, the main runner 16, the inclined guide rod 17, the side core 18, the sliding groove 19, the positioning step 20, the limiting surface 21, the guide block 22, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a lamp stand mould that supports from top to bottom around formula many runners, includes fixed die plate and movable mould board (2), fixed die plate (1) and movable mould board (2) between be provided with one-tenth die cavity (3), its characterized in that, one-tenth die cavity (3) circumference distribute have a plurality of buckle forming structure (4), movable mould board (2) on be provided with subchannel (5) corresponding with buckle forming structure (4), subchannel (5) and one-tenth die cavity (3) intercommunication.

2. The surrounding type multi-gate upper and lower matched lamp holder mold according to claim 1, wherein a core (6) protruding out of the movable mold plate (2) is arranged on the movable mold plate (2), a cavity (7) recessed towards the direction away from the core (6) is arranged on the fixed mold plate (1), and the buckle forming structure (4) is arranged in the forming cavity (3) close to the root of the core (6).

3. The surrounding type multi-gate upper and lower matched lamp holder mold according to claim 2, wherein the snap forming structure (4) comprises a first snap forming block (8) and a second snap forming block (9), the first snap forming block (8) is arranged on the mold core (6), the second snap forming block (9) is arranged on the mold cavity (7), and the first snap forming block (8) and the second snap forming block (9) are mutually abutted and connected in mold closing.

4. The surrounding type multi-gate upper and lower matched lamp holder mold as claimed in claim 3, wherein a first connecting surface (10) is arranged on the first snap forming block (8), a second connecting surface (11) is arranged on the second snap forming block (9), and when the mold is closed, the first connecting surface (10) and the second connecting surface (11) are abutted and overlapped.

5. The surrounding type multi-gate upper and lower matched lamp holder mold as claimed in claim 4, wherein the number of the sub-runners (5) corresponds to the number of the snap forming structures (4), and the gates (12) of the sub-runners (5) are respectively close to the snap forming structures (4).

6. The surrounding type multi-gate upper and lower matched lamp holder mold as claimed in claim 5, wherein the branch runners (5) are correspondingly provided with hot nozzles (13) fixedly connected in the fixed mold plate (1), one side of the fixed mold plate (1) far away from the movable mold plate (2) is provided with a branch runner structure (14), the branch runner structure (14) is provided with a branch runner groove (15), and the branch runner groove (15) is communicated with the hot nozzles (13).

7. The surrounding type multi-gate upper and lower matched lamp holder mold as claimed in claim 6, wherein the channel structure (14) is further provided with a main channel (16), and the main channel (16) is connected with the gate sleeve.

8. The surrounding type multi-gate upper and lower matched lamp holder mold according to claim 7, wherein an inclined guide rod (17) is arranged on the fixed mold plate (1) in a hollow manner between the hot nozzles (13), a side loose core (18) is slidably connected onto the inclined guide rod (17), and the side loose core (18) is slidably connected onto the movable mold plate (2).

9. The surrounding type multi-gate upper and lower matched lamp holder mold according to claim 8, wherein the movable mold plate (2) is provided with a sliding groove (19), and the side core (18) can slide along the sliding groove (19).

10. The surrounding type multi-gate upper and lower matched lamp holder mold according to claim 9, wherein the sliding groove (19) is provided with a positioning step (20), the side core (18) is provided with a limiting surface (21) parallel to the step surface of the positioning step (20), the positioning step (20) is fixedly connected with a guide block (22), and the guide block (22) is pressed on the limiting surface (21).