阅读说明：本技术 一种电池塑壳热流道注塑模具结构及方法 (Battery plastic shell hot runner injection mold structure and method ) 是由 韩峰 黄少云 吴军安 沈岳 李升华 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种电池塑壳热流道注塑模具结构及方法,涉及电池塑壳制造技术领域。在本发明中：上注塑架与下注塑盖板之间设有热流通道,下注塑盖板上配置有若干下注塑孔。上注塑架包括若干相互平行分布的横向板和一组相互平行的纵向板；每个横向板的中部位置设置有注塑口管,每个横向板上都设有两个测温安装管,两个测温安装管分布在注塑口管两侧；每个纵向板上都配置有若干测温安装管,纵向板上的每个测温安装管都位于相邻横向板之间板块的中间位置；测温安装管上安装有温度检测模块,横向板上设有位于测温安装管两侧的电加热条。本发明实现了根据电池塑壳产品构造进行预置分流温控化热流注塑,控制精度高,注塑流畅度高。(The invention discloses a hot runner injection mold structure and method for a battery plastic shell, and relates to the technical field of battery plastic shell manufacturing. In the present invention: a heat flow channel is arranged between the upper injection molding frame and the lower injection molding cover plate, and a plurality of lower injection molding holes are arranged on the lower injection molding cover plate. The upper injection molding frame comprises a plurality of transverse plates and a group of longitudinal plates, wherein the transverse plates are distributed in parallel; an injection molding opening pipe is arranged in the middle of each transverse plate, two temperature measuring installation pipes are arranged on each transverse plate, and the two temperature measuring installation pipes are distributed on two sides of the injection molding opening pipe; each longitudinal plate is provided with a plurality of temperature measurement mounting pipes, and each temperature measurement mounting pipe on the longitudinal plate is positioned in the middle of the plate between the adjacent transverse plates; the temperature measuring installation pipe is provided with a temperature detection module, and the transverse plate is provided with electric heating strips positioned on two sides of the temperature measuring installation pipe. The invention realizes the preset shunting temperature control and chemical heat flow injection molding according to the structure of the battery plastic shell product, and has high control precision and high injection molding smoothness.)

1. The utility model provides a battery moulds shell hot runner injection mold structure which characterized in that:

the injection molding device comprises an upper injection molding frame (1), wherein a lower injection molding cover plate (2) is connected to the lower side of the upper injection molding frame (1), a hot flow channel (3) is arranged between the upper injection molding frame (1) and the lower injection molding cover plate (2), and a plurality of lower injection molding holes (203) are arranged on the lower injection molding cover plate (2);

the upper injection molding frame (1) comprises a plurality of transverse plates (101) which are distributed in parallel and a group of longitudinal plates (102) which are parallel to each other;

an injection molding opening pipe (103) is arranged in the middle of each transverse plate (101), two temperature measuring installation pipes (104) are arranged on each transverse plate (101), and the two temperature measuring installation pipes (104) are distributed on two sides of the injection molding opening pipe (103);

each longitudinal plate (102) is provided with a plurality of temperature measuring mounting pipes (104), and each temperature measuring mounting pipe (104) on the longitudinal plate (102) is positioned in the middle of a plate between the adjacent transverse plates (101);

the temperature measuring device is characterized in that the temperature measuring installation pipe (104) is provided with a temperature detection module (4), and the transverse plate (101) is provided with electric heating strips (6) positioned on two sides of the temperature measuring installation pipe (104).

2. The battery plastic casing hot runner injection mold structure of claim 1, wherein:

a heating strip groove (105) is formed in the transverse plate (101), and the electric heating strip (6) is installed in the heating strip groove (105);

the transverse plate (101) is internally provided with a heat conduction strip (5), and the heat conduction strip (5) is contacted with the heating surface of the electric heating strip (6) in the heating strip groove (105).

3. The battery plastic casing hot runner injection mold structure of claim 2, wherein:

the lower side surface of the heat conduction strip (5) is in non-shielding contact with the heat flow channel (3), and the heat conduction strip (5) is made of a heat conduction alloy plate.

4. The battery plastic casing hot runner injection mold structure of claim 1, wherein:

the temperature detection module (4) comprises a thread mounting column (401) arranged in the temperature measurement mounting pipe (104) and a temperature measurement head (402) extending into the heat flow channel (3).

5. The battery plastic casing hot runner injection mold structure of claim 4, wherein:

the inner wall of the temperature measurement installation pipe (104) is provided with threads, and a sealing washer structure is arranged between the temperature detection module (4) and the temperature measurement installation pipe (104).

6. The battery plastic casing hot runner injection mold structure of claim 1, wherein:

the hot runner passageway (3) is including last water conservancy diversion passageway (106) and lower water conservancy diversion passageway (201), go up water conservancy diversion passageway (106) and be located the downside of last injection molding frame (1), water conservancy diversion passageway (201) are located down and mould plastics apron (2) upside down.

7. The battery plastic casing hot runner injection mold structure of claim 6, wherein:

the lower diversion channel (201) is divided into a transverse flow channel and a longitudinal flow channel, the lower injection molding holes (203) are communicated with the lower diversion channel (201), part of the lower injection molding holes (203) are positioned on the transverse flow channel, and the rest of the lower injection molding holes (203) are positioned at the intersection of the transverse flow channel and the longitudinal flow channel.

8. A control method for a hot runner injection mold for a battery plastic shell, which is characterized by comprising the following steps of adopting the hot runner injection mold structure for the battery plastic shell as claimed in any one of claims 1 to 7:

(1) each temperature detection module (4) independently transmits temperature information to the main control system, and the main side control system independently drives and controls each electric heating strip (6) to perform auxiliary heating;

(2) plastic liquid is synchronously injected into a plurality of injection molding opening pipes (103) on the upper injection molding frame (1), enters the hot flow channel (3) and is shunted to the two sides of the injection molding opening pipes (103);

(3) when the plastic liquid flows through the temperature measuring head (402) of the temperature measuring module (4), the temperature measuring head (402) detects temperature information, the temperature measuring module (4) transmits the temperature information to the main control system, the main control system judges the temperature information, the plastic liquid lower than the first-stage plastic flow temperature threshold value is heated and driven by the upstream and downstream double-section electric heating strips (6), and the plastic liquid lower than the second-stage plastic flow temperature threshold value is heated and driven by the downstream single-section electric heating strips (6).

9. The battery plastic case hot runner injection mold structure and method according to claim 1, wherein:

in the main control system, the first-level plastic flow temperature threshold value of the plastic liquid flowing through the temperature detection module (4) at any position is set as T₁A second plastic flow temperature threshold of T₂Setting the temperature of the plastic liquid detected by the temperature detection module (4) to be T_X；

When T_X≤T₁Then the main control system drives the electric heating strips (6) at the upstream and downstream positions of the position to perform electric heating;

when T₂≥T_X＞T₁Then the main control system drives the electric heating strip (6) at the downstream position at the position to perform electric heating.

Technical Field

The invention belongs to the technical field of manufacturing of battery plastic cases, and particularly relates to a hot runner injection mold structure and a hot runner injection mold method for a battery plastic case.

Background

Hot runner injection molding is a method of molding with a hot runner mold, which is an injection mold in which runners and a cavity are isolated from each other by a heat insulating material.

The battery plastic shell can adopt a direct injection molding method in the processing and manufacturing process. The structural characteristic distribution of the battery plastic shell is wide, the single-head injection molding is simplified, the temperature change is large after plastic heat flow is injected, the temperature controllability of plastic liquid entering the cavity of the battery plastic shell is poor, the temperature difference of the thermoplastic flow in many places is large, and the final forming effect is poor.

Aiming at the phenomenon, how to perform high-precision and high-smoothness heat flow injection molding according to the structure of the battery plastic shell product becomes a problem to be solved in the injection molding manufacturing process of the battery plastic shell.

Disclosure of Invention

The invention aims to provide a hot runner injection mold structure and a hot runner injection mold method for a battery plastic shell, which realize preset shunting temperature control and chemical heat flow injection according to the product structure of the battery plastic shell, and have high control precision and high injection smoothness.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a battery plastic shell hot runner injection mold structure, wherein a lower injection cover plate is connected to the lower side of an upper injection frame, a hot runner channel is arranged between the upper injection frame and the lower injection cover plate, and a plurality of lower injection holes are arranged on the lower injection cover plate. The upper injection molding frame comprises a plurality of transverse plates and a group of longitudinal plates, wherein the transverse plates are distributed in parallel; an injection molding opening pipe is arranged in the middle of each transverse plate, two temperature measuring installation pipes are arranged on each transverse plate, and the two temperature measuring installation pipes are distributed on two sides of the injection molding opening pipe; each longitudinal plate is provided with a plurality of temperature measurement mounting pipes, and each temperature measurement mounting pipe on the longitudinal plate is positioned in the middle of the plate between the adjacent transverse plates; the temperature measuring installation pipe is provided with a temperature detection module, and the transverse plate is provided with electric heating strips positioned on two sides of the temperature measuring installation pipe.

As a preferred technical scheme of the invention, a heating strip groove is arranged on the transverse plate, and the electric heating strip is arranged in the heating strip groove; the transverse plate is internally provided with a heat conduction strip which is contacted with the heating surface of the electric heating strip in the heating strip groove.

As a preferred technical scheme of the invention, the lower side surface of the heat conducting strip is in non-shielding contact with the heat flow channel, and the heat conducting strip adopts a heat conducting alloy plate.

As a preferred technical scheme of the invention, the temperature detection module comprises a threaded mounting column arranged in the temperature measurement mounting pipe and a temperature measurement head extending into the heat flow channel.

As a preferred technical scheme of the invention, the inner wall of the temperature measurement installation pipe is provided with threads, and a sealing washer structure is arranged between the temperature detection module and the temperature measurement installation pipe.

As a preferred technical scheme of the invention, the hot flow channel comprises an upper flow guide channel and a lower flow guide channel, the upper flow guide channel is positioned on the lower side surface of the upper injection molding frame, and the lower flow guide channel is positioned on the upper side surface of the lower injection molding cover plate.

As a preferred technical scheme of the invention, the lower diversion channel is divided into the transverse flow channel and the longitudinal flow channel, the lower injection molding holes are communicated with the lower diversion channel, part of the lower injection molding holes are positioned on the transverse flow channel, and the rest of the lower injection molding holes are positioned at the intersection of the transverse flow channel and the longitudinal flow channel.

The invention relates to a control method of a battery plastic shell hot runner injection mold, which specifically comprises the following steps:

(1) each temperature detection module independently transmits temperature information to the main control system, and the main side control system independently drives and controls each electric heating strip to perform auxiliary heating; (2) a plurality of injection molding opening pipes on the upper injection molding frame are synchronously injected with plastic liquid, and the plastic liquid enters the hot flow channel and is shunted to the two sides of the injection molding opening pipes; (3) when the plastic liquid flows through the temperature measuring head of the temperature measuring module, the temperature measuring head detects temperature information, the temperature measuring module transmits the temperature information to the main control system, the main control system judges the temperature information, the plastic liquid below the first-stage plastic flow temperature threshold value is heated and driven by the upstream and downstream double-section electric heating strips, and the plastic liquid below the second-stage plastic flow temperature threshold value is heated and driven by the downstream single-section electric heating strips.

As a preferred technical scheme of the invention, in the main control system, a primary plastic flow temperature threshold value of plastic liquid flowing through a temperature detection module at any position is set as T₁A second plastic flow temperature threshold of T₂Setting the temperature of the plastic liquid detected by the temperature detection module to be T_X(ii) a When T_X≤T₁If the position of the heating strip is not the same as the position of the heating strip, the main control system drives the heating strips at the upstream and downstream positions to perform electric heating; when T₂≥T_X＞T₁Then the main control system drives the electric heating strip at the downstream position at the position to perform electric heating.

The invention has the following beneficial effects:

1. the upper injection molding frame is arranged on an injection mold of a battery plastic shell, the lower injection molding cover plate is arranged on the lower side of the upper injection molding frame, a hot flow channel matched with a frame body structure of the battery plastic shell is formed between the upper injection molding frame and the lower injection molding cover plate, the upper injection molding frame is provided with a temperature detection module, independent electric heating strips are arranged on two sides of the temperature detection module, plastic liquid flowing along the hot flow channel is subjected to auxiliary heating of corresponding sections, and injection molding is performed downwards through lower injection molding holes at node positions;

2. the invention realizes the preset shunting temperature control and chemical heat flow injection molding according to the structure of the battery plastic shell product, and has high control precision and high injection molding smoothness.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the integral structure of the upper injection molding frame and the lower injection molding cover plate of the present invention;

FIG. 2 is a schematic structural view of a lower injection molded cover plate according to the present invention;

FIG. 3 is a schematic view of a partially assembled structure of an upper injection molding frame and a lower injection molding cover plate according to the present invention;

FIG. 4 is a schematic structural diagram of a temperature detection module according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-mounting an injection molding frame; 2-lower injection molding cover plate; 3-a heat flow channel; 4-a temperature detection module; 5-heat conducting strips; 6-electrically heating the strip; 101-a transverse plate; 102-longitudinal plates; 103-injection molding of a mouth tube; 104-temperature measuring installation pipes; 105-heating the bar groove; 106-upper flow guide channel; 201-lower flow guide channel; 202-installing an orifice plate; 203-lower injection molding holes; 401-threaded mounting post; 402-temperature measuring head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The invention relates to a battery plastic shell hot runner injection mold structure, which specifically comprises the following contents:

the lower injection molding cover plate 2 is arranged on the lower side of the upper injection molding frame 1, a plurality of connecting plate blocks are arranged between the upper injection molding frame 1 and the lower injection molding cover plate 2 during installation, and the connecting plate blocks are all connected in a reinforcing mode through bolts.

The upper injection moulding frame 1 comprises a plurality of transverse plates 101 and a set of longitudinal plates 102, the transverse plates 101 being parallel to each other and the set of longitudinal plates 102 being parallel to each other.

The lower side surface of the upper injection molding frame 1 is provided with an upper diversion channel 106, the upper side surface of the lower injection molding cover plate 2 is provided with a lower diversion channel 201, the lower diversion channel 201 is divided into a transverse flow channel and a longitudinal flow channel, and the upper diversion channel 106 and the lower diversion channel 201 form a heat flow channel 3 together.

Wherein, a plurality of lower injection holes 203 are arranged on the lower injection cover plate 2, and the lower injection holes 203 are communicated with the lower diversion channel 201. The partial lower injection holes 203 are grouped in pairs and distributed on the cross flow channel. The remaining lower molding apertures 203 are located at the intersection of the crossflow channel and the crossflow channel.

Example two

Based on the first embodiment, the invention: each transverse plate 101 is provided with an injection opening pipe 103, and the injection opening pipe 103 is positioned in the middle of the transverse plate 101. Two temperature measurement mounting pipes 104 are fixedly arranged on the transverse plate 101, and the two temperature measurement mounting pipes 104 are positioned at two sides of the injection molding opening pipe 103. The longitudinal plate 102 is provided with a plurality of temperature measurement mounting pipes 104, and the temperature measurement mounting pipes 104 on the longitudinal plate 102 are positioned in the middle of the plate block section between two adjacent transverse plates 101.

The transverse plate 101 is provided with a heating strip groove 105, the electric heating strip 6 is installed in the heating strip groove 105, the heat conduction strip 5 is located below the heating strip groove 105, the heat conduction strip 5 is made of a heat conduction alloy plate material, and the heat conduction strip 5 is in heat conduction contact with the lower side heating surface of the electric heating strip 6. The lower side of the heat conducting strip 5 is in thermal contact with the plastic liquid circulating in the heat flow channel 3.

The temperature detection module 4 is arranged on the temperature measurement mounting tube 104, and the electric heating strips 6 are arranged on two sides of the temperature measurement mounting tube 104 on the transverse plate 101. The temperature detection module 4 comprises a threaded mounting column 401 and a temperature measuring head 402, wherein the threaded mounting column 401 is mounted in the temperature measuring mounting pipe 104, and the temperature measuring head 402 extends into the heat flow channel 3.

The inner wall of the temperature measurement mounting pipe 104 is provided with threads for mounting the threaded mounting post 401. A sealing washer is arranged between the temperature detection module 4 and the temperature measurement installation pipe 104, and the sealing washer can be a high-temperature-resistant rubber pad.

EXAMPLE III

Based on the first embodiment and the second embodiment, the invention comprises a control method of a battery plastic shell hot runner injection mold, which comprises the following steps:

every temperature detection module 4 independently transmits temperature information to main control system, and after main control system obtained temperature information, carries out the temperature information contrastive analysis that each section corresponds, and main side control system independently drives and controls each electric heating strip 6 and assists the heat. The plurality of injection opening pipes 103 start to inject the plastic liquid synchronously, and the plastic liquid enters the heat flow channel 3 and then is divided to the two sides of the injection opening pipes 103.

When the shunted plastic liquid flows through the temperature detection module 4 and extends into the temperature measurement head 402 of the hot flow channel 3, the temperature measurement head 402 detects temperature information, the temperature detection module 4 transmits the temperature information to the main control system, the main control system judges the temperature information and judges that the temperature information is lower than a first-level plastic flow temperature threshold value T₁The plastic liquid is heated and driven by an upstream and a downstream double-section electric heating strip 6, and the temperature threshold T lower than the second-stage plastic flow is controlled₂The plastic liquid of (2) is subjected to heating driving of the downstream single-section electric heating strip 6.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.