Sensor forming die

Abstract

The utility model belongs to the technical field of automobile sensors, and particularly relates to a sensor forming die which comprises a fixed die, a movable die is arranged on one side of the fixed die, a first cavity is formed in one side of the fixed die, a second cavity is formed in one side of the movable die, and a liftable central shaft is arranged between the first cavity and the second cavity. A guide seat is arranged at the position, below the first cavity, of the fixed mold, a movable cavity is downwards formed in the top of the guide seat, and the center shaft can vertically ascend and descend along the movable cavity; according to the injection mold, the center shaft is arranged between the cavities of the movable mold and the fixed mold, after raw materials are injected into the cavities, a hollow cylindrical shell can be formed between the cavities and the center shaft, the failure rate can be reduced through the structure of the center shaft, the injection mold can be continuously used for manufacturing the hollow cylindrical shell, and the production efficiency is improved. Therefore, the requirement of continuous production and manufacturing can be met, and the production efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile sensor, especially a sensor forming die. BACKGROUND

[0002] The automobile sensor is a kind of sensor that is composed of sensitive element and conversion element, which can convert various working condition information in the running process of automobile, such as temperature, pressure, position, speed, etc., into electrical signal to transmit to the electronic control unit of automobile, so that the control unit can accurately control each system of automobile, and the detection element of automobile sensor is generally provided with a plastic shell outside.

[0003] The existing automobile sensor plastic shell is usually formed by injection molding mold injection molding, due to different types of sensors, the shape of sensor plastic shell is also different, among them, the hollow cylindrical shell is usually made by injection molding mold and specifically by blow molding process, but the existing injection molding mold combined with blow molding process to produce shell usually has the problems of product surface not smooth, easy to produce bubbles, after mass production of sensor shell, the quality of the obtained product is getting worse and worse, which cannot meet the needs of continuous use. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of sensor forming die to solve the problem that shell product quality gradually declines when existing injection molding mold is combined with blow molding process to produce shell, cannot meet the needs of continuous production.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] A kind of sensor forming die, including fixed mould, the side of the fixed mould is provided with movable mould, the side of the fixed mould is provided with first cavity, the side of the fixed mould is provided with injection rod, the middle part of the injection rod and the inside of the fixed mould are both provided with injection hole, the injection hole is communicated with the first cavity, the side of the movable mould is provided with second cavity, the first cavity and the second cavity are provided with the center shaft that can be lifted between them, the fixed mould is provided with guide seat at the position below the first cavity, the top of the guide seat is provided with movable cavity downward, the center shaft can be lifted vertically along movable cavity.

[0007] Preferably, the outside of the guide seat is provided with lifting device, the lifting end of the lifting device is provided with connecting rod, the both sides of the guide seat are provided with sliding slot, the extension end of the connecting rod passes through the sliding slot to the inside of the guide seat and is connected with the bottom of the center shaft, the middle part of the center shaft is provided with center hole, the inside of the guide seat is provided with guide rod, the guide rod is inserted into the center hole.

[0008] Preferably, the movable mold is internally provided with a ejector rod, one end of the ejector rod is flush with the inner wall of the second cavity, the other end extends to the outside of the movable mold, and is provided with a limiting block, the end of the limiting block is fixedly provided with a fixed plate, the fixed plate is further fixedly provided with a telescopic device, and the telescopic end of the telescopic device is fixedly connected with the movable mold.

[0009] Preferably, the outer wall of the movable mold is symmetrically provided with a sliding sleeve, and one side of the fixed plate is provided with a sliding rod, and the sliding sleeve can slide horizontally on the sliding rod.

[0010] Preferably, the fixed mold is provided with a positioning pin on the side surface opposite to the movable mold, and the movable mold is provided with a pin hole matched with the positioning pin.

[0011] Preferably, the fixed mold is internally provided with a cooling cavity, and the top and bottom of the cooling cavity are provided with sealing plates, and the sealing plates are communicated with cooling water pipes.

[0012] Preferably, the movable mold is provided with a containing groove on the outer periphery of one side surface, the fixed mold is provided with a sealing ring on the outer periphery of the side surface opposite to the containing groove, and the sealing ring is matched with the containing groove.

[0013] Preferably, the fixed mold is fixedly provided with a supporting seat on one side, and one end of the injection rod penetrates through the supporting seat.

[0014] Preferably, the first cavity and the second cavity are injection molded with a shell body, the middle part of the shell body is provided with a through hole, and one end of the center shaft can be inserted into the through hole.

[0015] The utility model has the advantages that: through the center shaft arranged between the movable mold and the fixed mold, after the raw material is injected into the cavity, a hollow cylindrical shell can be formed between the cavity and the center shaft, the center shaft is pulled out downward before demolding, so that the ejector pin can push the shell out of the cavity, through the structure of the center shaft, the failure rate can be reduced, and the injection mold of the utility model can be continuously used to manufacture the hollow cylindrical shell, thereby meeting the needs of continuous production and manufacturing, and effectively improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 is a structure schematic view of the fixed mold, the center shaft and the guide seat of the utility model;

[0019] Figure 3 is a sectional view of the guide seat of the utility model;

[0020] Figure 4 is a structure schematic view of the utility model;

[0021] Figure 5 is a perspective view of the shell body of the utility model.

[0022] In the figure: 1, movable mold; 2, fixed mold; 3, center shaft; 4, cooling water pipe; 5, sealing plate; 6, support seat; 7, guide seat; 71, guide rod; 8, lifting device; 9, sliding sleeve; 10, sliding rod; 11, telescopic device; 12, fixed plate; 13, positioning pin; 14, first cavity; 15, connecting rod; 16, limiting block; 17, ejector rod; 18, sealing ring; 19, accommodating groove; 20, pin hole; 21, second cavity; 22, center hole; 23, cooling cavity; 24, injection rod; 25, injection hole; 26, shell body. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] As Figures 1-5As shown in the sensor forming die, the fixed die 2 is provided with the movable die 1 on one side, the first cavity 14 is formed on one side of the fixed die 2, the injection rod 24 is arranged on one side of the fixed die 2, the injection hole 25 is formed in the middle of the injection rod 24 and the inside of the fixed die 2, the injection hole 25 is communicated with the first cavity 14, the second cavity 21 is formed on one side of the movable die 1, the liftable central shaft 3 is arranged between the first cavity 14 and the second cavity 21, the guide seat 7 is arranged at the position below the first cavity 14 of the fixed die 2, the movable cavity is formed downward on the top of the guide seat 7, and the central shaft 3 can be vertically lifted along the movable cavity; the liftable device 8 is arranged outside the guide seat 7, the liftable device 8 can adopt a linear motor, the connecting rod 15 is arranged on the lifting end of the liftable device 8, the sliding groove is formed on both sides of the guide seat 7, the extension end of the connecting rod 15 passes through the sliding groove to the inside of the guide seat 7 and is connected with the bottom of the central shaft 3, the central hole 22 is formed in the middle of the central shaft 3, the guide rod 71 is arranged in the inside of the guide seat 7 and is inserted into the central hole 22; the guide rod 71 has the function of guiding the vertical lifting of the central shaft 3, which is beneficial to keeping the central shaft 3 in a vertical state during lifting and preventing position deviation.

[0025] In the injection molding process, specifically, the central shaft 3 is driven upward by the liftable device 8, the central shaft 3 is inserted into the first cavity 14, after the mold is closed, the central shaft 3 is located in the first cavity 14 and the second cavity 21, after the raw materials are injected into the first cavity 14 and the second cavity 21, the central shaft 3 serves as a mold core structure to form a cylindrical structure between the first cavity 14 and the second cavity 21, the raw materials completely fill the first cavity 14 and the second cavity 21, and after cooling, the central shaft 3 is pulled downward by the liftable device 8, and a hollow structure is left after the central shaft 3 is separated, so that the shell injected has a hollow inside.

[0026] As shown in the figure, Figures 1-3 The top rod 17 is arranged in the inside of the movable die 1, one end of the top rod 17 is flush with the inner wall of the second cavity 21, the other end extends to the outside of the movable die 1 and is provided with the limiting block 16, the end of the limiting block 16 is fixedly provided with the fixed plate 12, the fixed plate 12 is generally in a fixed state and keeps the position unchanged, the fixed plate 12 is further fixedly provided with the telescopic device 11, and the telescopic end of the telescopic device 11 is fixedly connected with the movable die 1; the telescopic device 11 can adopt an oil cylinder or an air cylinder;

[0027] The sliding sleeve 9 is symmetrically arranged on the outer wall of the movable die 1, the sliding rod 10 is arranged on one side of the fixed plate 12, and the sliding sleeve 9 can slide horizontally on the sliding rod 10;

[0028] After injection molding is completed and the central shaft 3 is removed, the injection-molded sensor housing remains in the second cavity 21. The moving mold 1 is pulled by the telescopic device 11, and the moving mold 1 moves towards the fixed plate 12. At the same time, the end of the ejector rod 17 pushes the sensor housing remaining in the second cavity 21 away, and the sensor housing falls downward, thus completing the demolding.

[0029] It should be noted that the function of the limiting block 16 is to fix the ejector rod 17 and support the moving mold 1;

[0030] During the movement of the moving mold 1, the moving mold 1 drives the sliding sleeve 9 to move synchronously. The cooperation between the sliding sleeve 9 and the sliding rod 10 can maintain the stability of the moving mold 1 and ensure that the moving mold 1 will not shake during the movement.

[0031] like Figure 2 and Figure 4 As shown, a positioning pin 13 is provided on one side of the fixed mold 2 facing the moving mold 1, and a pin hole 20 that cooperates with the positioning pin 13 is opened on one side of the moving mold 1. During the mold closing process, the positioning pin 13 is inserted into the pin hole 20. Under the guidance of the positioning pin 13, the end face of the fixed mold 2 fits against the end face of the moving mold 1, which helps to improve the accuracy of mold closing.

[0032] like Figure 1 and Figure 4 As shown, a cooling cavity 23 is provided inside the fixed mold 2. Sealing plates 5 are provided at the top and bottom of the cooling cavity 23. Cooling water pipes 4 are connected to the sealing plates 5. The extended end of the cooling water pipes 4 is connected to a circulating water pump and a cooling water tank. The circulating water pump draws coolant and circulates it in the cooling water tank and the cooling cavity 23. The coolant carries away the heat of the fixed mold 2, which facilitates the rapid cooling of the raw material injected into the first cavity 14 and is beneficial to the molding of the outer shell.

[0033] like Figure 4 As shown, a receiving groove 19 is provided around one side of the moving mold 1, and a sealing ring 18 is provided around one side of the fixed mold 2 facing the receiving groove 19. The sealing ring 18 cooperates with the receiving groove 19. After the mold is closed, the sealing ring 18 is located in the receiving groove 19. Through the sealing effect of the sealing ring 18, there is no gap between the moving mold 1 and the fixed mold 2, so that there will be no air leakage during the injection molding process.

[0034] like Figure 1 and Figure 4 As shown, a support base 6 is fixed on one side of the fixed mold 2, and one end of the injection rod 24 is provided through the support base 6. The support base 6 is used to support the fixed mold 2 and the injection rod 24 to maintain the position of the fixed mold 2 and the injection rod 24. The position of the fixed mold 2 and the injection rod 24 remains unchanged during the injection molding process of the shell.

[0035] like Figures 1-5As shown, the outer shell body 26 is injection molded in the first cavity 14 and the second cavity 21. The specific injection molding process is as follows: the moving mold 1 and the fixed mold 2 are closed, and the raw material is injected into the injection hole 25 of the injection rod 24 through the injection machine. The raw material is injected into the first cavity 14. Under continuous pressure, the raw material fills the first cavity 14 and the second cavity 21. At this time, the central shaft 3 is located between the first cavity 14 and the second cavity 21. The raw material forms the outer shell body 26 outside the central shaft 3, in the first cavity 14 and the second cavity 21. A through hole is opened in the middle of the outer shell body 26. The through hole is formed after the central shaft 3 is removed.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sensor molding die, comprising a fixed mold (2), a movable mold (1) disposed on one side of the fixed mold (2), a first cavity (14) formed on one side of the fixed mold (2), an injection rod (24) disposed on one side of the fixed mold (2), injection holes (25) formed in the middle of the injection rod (24) and inside the fixed mold (2), the injection holes (25) communicating with the first cavity (14), and a second cavity (21) formed on one side of the movable mold (1), characterized in that: The first cavity (14) and the second cavity (21) are provided with a liftable center shaft (3), the mold (2) is provided with a guide seat (7) at a lower position of the first cavity (14), the top of the guide seat (7) is provided with a movable cavity, and the center shaft (3) can be vertically lifted along the movable cavity.

2. A sensor forming die according to claim 1, wherein: The guide seat (7) is provided with a lifting device (8) outside, the lifting end of the lifting device (8) is provided with a connecting rod (15), both sides of the guide seat (7) are provided with a sliding groove, the extension end of the connecting rod (15) penetrates through the sliding groove to the inside of the guide seat (7) and is connected with the bottom of the center shaft (3), the center hole (22) is arranged in the middle of the center shaft (3), and the inside of the guide seat (7) is provided with a guide rod (71), which is inserted into the center hole (22).

3. The sensor molding die of claim 1, wherein: The movable mold (1) is provided with a ejector rod (17) inside, one end of the ejector rod (17) is flush with the inner wall of the second cavity (21), the other end extends to the outside of the movable mold (1) and is provided with a limiting block (16), the end of the limiting block (16) is fixedly provided with a fixed plate (12), the fixed plate (12) is further fixedly provided with a telescopic device (11), and the telescopic end of the telescopic device (11) is fixedly connected with the movable mold (1).

4. A sensor forming die according to claim 3, wherein: The outer wall of the movable mold (1) is symmetrically provided with a sliding sleeve (9), one side of the fixed plate (12) is provided with a sliding rod (10), and the sliding sleeve (9) can slide horizontally on the sliding rod (10).

5. The sensor molding die of claim 1, wherein: The side of the mold (2) opposite to the movable mold (1) is provided with a positioning pin (13), and the side of the movable mold (1) is provided with a pin hole (20) matched with the positioning pin (13).

6. The sensor molding die of claim 1, wherein: The inside of the mold (2) is provided with a cooling cavity (23), and the top and bottom of the cooling cavity (23) are provided with sealing plates (5), and the sealing plates (5) are connected with cooling water pipes (4).

7. The sensor molding die of claim 1, wherein: The side of the movable mold (1) is provided with a containing groove (19) around the periphery, and the side of the mold (2) opposite to the containing groove (19) is provided with a sealing ring (18) around the periphery, and the sealing ring (18) is matched with the containing groove (19).

8. The sensor forming die of claim 1, wherein: One side of the mold (2) is fixedly provided with a supporting seat (6), and one end of the injection rod (24) penetrates through the supporting seat (6).

9. The sensor forming die of claim 1, wherein: The first cavity (14) and the second cavity (21) are provided with an outer shell body (26), the middle of the outer shell body (26) is provided with a through hole, and one end of the center shaft (3) can be inserted into the through hole.

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