Mold locking device for blow molding

Abstract

The utility model provides a mold locking device for blow molding. The mold locking device comprises a base and a fixed mold mounted on the base, a movable mold located on one side of the fixed mold and an air cylinder used for driving the movable mold to be close to or away from the fixed mold are mounted on the base; a limiting box is installed on the side face of the fixed mold, a cavity is formed in the limiting box, a pressure alarm piece is installed on the inner wall of the cavity, an elastic pressing piece facing the pressure alarm piece is slidably connected to the limiting box in a penetrating mode, and an ejection piece located on one side of the limiting box is installed on the side face of the movable mold. The elastic pressing piece is pushed by the ejecting piece to abut against the pressure alarm piece. The utility model provides a mold locking device for blow molding, and solves the problems that an existing air cylinder cannot detect whether a gap exists between a movable mold and a fixed mold or not in real time and cannot give an early warning for the potential gap.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding machines, in particular to a clamping device for blow molding. Background Art

[0002] Blow molding machine is a kind of equipment used to produce plastic products. It is mainly used to blow-mold plastic materials through heating and air pressure. It can inject heated and molten plastic materials into the mold, and then use air pressure to blow and expand the plastic materials in the mold to form plastic products with the desired shape. In the process of mold closing of the blow molding machine, in order to ensure that the molds fit tightly together, it is necessary to use a cylinder to push the movable mold and the fixed mold to close the mold, realize the locking of the movable mold and the fixed mold, and ensure that the movable mold and the fixed mold fit tightly together. Only then can the blow molding proceed smoothly and ensure the quality and shape consistency of the product;

[0003] The existing cylinders used to push the movable mold and the fixed mold to close the mold have the main function of making the movable mold and the fixed mold fit tightly together. However, these cylinders cannot detect whether there is a gap between the movable mold and the fixed mold in real time, nor can they warn of potential gap problems. Utility Model Content

[0004] The utility model provides a mold locking device for blow molding, wherein an elastic pressure piece is pushed against a pressure alarm piece by a top piece on the side of a movable mold. When a gap appears between the movable mold and a fixed mold, the force with which the elastic pressure piece abuts against the pressure alarm piece will change, thereby making it possible to detect in real time whether there is a gap between the movable mold and the fixed mold, and to give a timely warning when a gap appears.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamping device for blow molding, comprising: a base and a fixed mold installed on the base;

[0006] The base is provided with a movable mold located on one side of the fixed mold and a cylinder for driving the movable mold to move closer to or away from the fixed mold;

[0007] A limit box is installed on the side of the fixed mold, a cavity is opened in the limit box, a pressure alarm is installed on the inner wall of the cavity, an elastic pressure piece arranged toward the pressure alarm is slidably connected to the limit box, and a top piece located on one side of the limit box is installed on the side of the movable mold. When the movable mold approaches the fixed mold, the elastic pressure piece is pushed by the top piece to abut against the pressure alarm.

[0008] Preferably, the pressure alarm component includes a pressure sensor and an alarm, the pressure sensor is installed on the inner wall of the cavity, the alarm is installed on the limit box, and the alarm is electrically connected to the pressure sensor.

[0009] Preferably, the elastic pressure piece includes a pressure rod, a pressure block and a spring. The side of the limit box is provided with an opening connected to the cavity. The pressure rod slides through the opening and extends into the cavity. The pressure block is installed at one end of the pressure rod close to the pressure sensor. The spring is sleeved on the pressure rod, and the two ends of the spring are respectively connected to the pressure block and the inner wall of the limit box.

[0010] Preferably, the top member comprises a fixed block, the fixed block is mounted on the side of the movable mold and located on one side of the limit box, and a screw rod arranged toward the pressure rod is mounted on the fixed block.

[0011] Preferably, a through threaded channel is provided in the fixing block, and the screw thread passes through the threaded channel.

[0012] Preferably, it also includes an end block, which is installed at one end of the screw rod away from the pressure rod.

[0013] The beneficial effects of the utility model are:

[0014] By setting the pressure alarm part, elastic pressure part and push part, when the movable mold is driven by the cylinder to approach the fixed mold and abut against it, the elastic pressure part and the pressure alarm part can be pushed to abut against each other by the push part on the side of the movable mold. When a gap appears between the movable mold and the fixed mold, the force of the elastic pressure part abutting against the pressure alarm part will change, and the pressure alarm part can be used to alarm. This structure can detect in real time whether there is a gap between the fixed mold and the movable mold. When a gap appears between the fixed mold and the movable mold, the pressure alarm part will alarm, which can warn of potential mold problems in advance so that maintenance or adjustments can be made in time to avoid problems in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a structural schematic diagram of a mold clamping device for blow molding proposed by the utility model;

[0017] Figure 2 It is a partial structural schematic diagram of a clamping device for blow molding proposed by the utility model;

[0018] Numbers in the figure: 1, base; 2, fixed mold; 3, movable mold; 4, cylinder; 5, limit box; 6, pressure alarm; 61, pressure sensor; 62, alarm; 7, elastic pressure piece; 71, pressure rod; 72, pressure block; 73, spring; 8, top piece; 81, fixed block; 82, screw; 83, end block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] according to Figure 1 and Figure 2 As shown, a clamping device for blow molding comprises: a base 1 and a fixed mold 2 installed on the base 1;

[0021] In this embodiment, a movable mold 3 located at one side of the fixed mold 2 and a cylinder 4 for driving the movable mold 3 to move closer to or away from the fixed mold 2 are installed on the base 1 .

[0022] In this embodiment, a limit box 5 is installed on the side of the fixed mold 2, a cavity is opened in the limit box 5, and a pressure alarm 6 is installed on the inner wall of the cavity. The pressure alarm 6 includes a pressure sensor 61 and an alarm 62. The pressure sensor 61 is installed on the inner wall of the cavity, and the alarm 62 is installed on the limit box 5, and the alarm 62 is electrically connected to the pressure sensor 61.

[0023] In this embodiment, the limit box 5 is slidably connected with an elastic pressure piece 7 arranged toward the pressure alarm 6. The elastic pressure piece 7 includes a pressure rod 71, a pressure block 72 and a spring 73. The side of the limit box 5 is provided with an opening connected to the cavity. The pressure rod 71 slides through the opening and extends into the cavity. The pressure block 72 is installed at one end of the pressure rod 71 close to the pressure sensor 61. The spring 73 is sleeved on the pressure rod 71, and the two ends of the spring 73 are respectively connected to the pressure block 72 and the inner wall of the limit box 5.

[0024] In this embodiment, a top piece 8 located on one side of the limit box 5 is installed on the side of the movable mold 3. When the movable mold 3 approaches the fixed mold 2, the elastic pressure piece 7 is pushed by the top piece 8 to abut against the pressure alarm piece 6. The top piece 8 includes a fixed block 81, which is installed on the side of the movable mold 3 and located on one side of the limit box 5. The fixed block 81 is installed with a screw rod 82 arranged toward the pressure rod 71. A through threaded channel is opened in the fixed block 81, and the screw rod 82 is threaded through the threaded channel.

[0025] It should be noted that: in order to be able to give an alarm after a gap appears between the fixed mold 2 and the movable mold 3, when the movable mold 3 is driven by the cylinder 4 to approach the fixed mold 2 and abut against it, the pressure rod 71 can be pushed close to the pressure sensor 61 by the screw 82 on the side of the movable mold 3, so that the pressure block 72 on the pressure rod 71 can abut against the pressure sensor 61. When a gap appears between the movable mold 3 and the fixed mold 2, the force with which the pressure block 72 on the pressure rod 71 abuts against the pressure sensor 61 will change, and then an alarm can be given through the alarm 62. This structure can detect in real time whether there is a gap between the fixed mold 2 and the movable mold 3. When a gap appears between the fixed mold 2 and the movable mold 3, an alarm can be given through the alarm 62, which can warn of potential mold problems in advance so that maintenance or adjustments can be made in time to avoid problems in the production process.

[0026] In a specific embodiment, an end block 83 is further included. The end block 83 is installed at an end of the screw rod 82 away from the pressure rod 71 .

[0027] It should be noted that the end block 83 is provided to facilitate the rotation of the screw rod 82 , thereby adjusting the position of the screw rod 82 on the fixed block 81 .

[0028] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A clamping device for blow molding, characterized in that , comprising: a base (1) and a fixed mold (2) mounted on the base (1); The base (1) is provided with a movable mold (3) located on one side of the fixed mold (2) and a cylinder (4) for driving the movable mold (3) to move closer to or away from the fixed mold (2); A limit box (5) is installed on the side of the fixed mold (2), a cavity is opened in the limit box (5), a pressure alarm component (6) is installed on the inner wall of the cavity, an elastic pressure component (7) is slidably connected to the limit box (5) and arranged toward the pressure alarm component (6), and a top component (8) located on one side of the limit box (5) is installed on the side of the movable mold (3), and when the movable mold (3) approaches the fixed mold (2), the elastic pressure component (7) is pushed by the top component (8) to abut against the pressure alarm component (6).

2. A clamping device for blow molding according to claim 1, characterized in that: The pressure alarm component (6) comprises a pressure sensor (61) and an alarm (62); the pressure sensor (61) is mounted on the inner wall of the cavity; the alarm (62) is mounted on the limit box (5); and the alarm (62) is electrically connected to the pressure sensor (61).

3. A clamping device for blow molding according to claim 2, characterized in that: The elastic pressure piece (7) includes a pressure rod (71), a pressure block (72) and a spring (73). The side of the limit box (5) is provided with an opening connected to the cavity. The pressure rod (71) slides through the opening and extends into the cavity. The pressure block (72) is installed at one end of the pressure rod (71) close to the pressure sensor (61). The spring (73) is sleeved on the pressure rod (71), and the two ends of the spring (73) are respectively connected to the pressure block (72) and the inner wall of the limit box (5).

4. A mold clamping device for blow molding according to claim 3, characterized in that: The top member (8) comprises a fixed block (81), which is mounted on the side of the movable mold (3) and located on one side of the limit box (5), and a screw rod (82) arranged toward the pressure rod (71) is mounted on the fixed block (81).

5. A mold clamping device for blow molding according to claim 4, characterized in that: A through threaded channel is provided in the fixing block (81), and the screw rod (82) is threadedly passed through the threaded channel.

6. A mold clamping device for blow molding according to claim 5, characterized in that: It also includes an end block (83), which is installed at one end of the screw rod (82) away from the pressure rod (71).

Images